Malicious PDF — malware analysis report

Static analysis result for SHA-256 59f1db16347affef…

MALICIOUS

PDF

102.8 KB Created: 2021-07-29 17:08:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 10867ae40889685d1e81adbcccded468 SHA-1: c359660f00143efa9e7f373acc832fec7035937e SHA-256: 59f1db16347affef5c30e6085776c5c85bd96eb4177b190ef4b4eeeea21e8b6e
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains multiple links pointing to compromised WordPress sites, suggesting an attempt to host malicious content or facilitate phishing. The presence of a 'download' button lure and brand impersonation (Apple) further supports a phishing or malware distribution attack pattern. Although no scripts were directly extracted, the nature of the links and heuristic firings indicate the PDF is designed to exploit vulnerabilities or trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=how+to+copy+the+best+traders+on+etoro.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://medok18.ru/wp-content/plugins/super-forms/uploads/php/files/7443ab0b16d247a60fe258130f9f1ce6/ludaximebuxewisodax.pdf In PDF document text
    • http://www.gcsystem.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160885da292228---62393685231.pdfIn PDF document text
    • https://bindazzled.com.au/wp-content/plugins/super-forms/uploads/php/files/0879d9ccfddca819e9ae2f301dbbd52e/lakunizajubirarixesidekep.pdfIn PDF document text
    • https://handinhand-daycare.com/ckfinder/userfiles/files/12248356126.pdfIn PDF document text
    • https://c4ir.ae/wp-content/plugins/super-forms/uploads/php/files/n0mb5ektlfnd6q0vpmituqcg16/zobolarajafuloxo.pdfIn PDF document text
    • http://www.liveartsaskatchewan.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b07fdf23412---33296783335.pdfIn PDF document text
    • https://adasms.fr/userfiles/file/laforukapipozosibitaje.pdfIn PDF document text
    • https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/kl62vk1595t0gkbklomfh69h11/vezubatalo.pdfIn PDF document text
    • http://augustaelectricalwork.com/editorData/file/63507974658.pdfIn PDF document text
    • http://baybayankaauamo.com/clients/c/c9/c9e0f772d4a556598cfa564a27137582/File/kusuzikufugawotapepemene.pdfIn PDF document text
    • http://alliusie.com/userfiles/file/88009390003.pdfIn PDF document text
    • http://presssimayeshahr.ir/pic/file/81136570744.pdfIn PDF document text
    • http://jhferry.com/data/fckeditor/file///58866654831.pdfIn PDF document text
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/cd94bbd4021b03aab7691dad57097c01/75489522477.pdfIn PDF document text
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090733586eda---32440555785.pdfIn PDF document text
    • http://mysistermyfriendministries.org/clients/85776/File/momenupokatalomebedukijab.pdfIn PDF document text
    • http://natur-pet.cz/webpagebuilder/ckfinder/userfiles/files/tititesulemunuvi.pdfIn PDF document text
    • http://fitnessklub-impuls.pl/uploads/assets/file/viligukategebonolugexar.pdfIn PDF document text
    • https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075d2633ba02---73449387788.pdfIn PDF document text
    • http://acpiindia.com/userfiles/file/33567352853.pdfIn PDF document text
    • https://www.llgnjinc.com/wp-content/plugins/super-forms/uploads/php/files/a57b94618c83a776047a358b997440b5/xakev.pdfIn PDF document text
    • https://broadstripe.com/wp-content/plugins/super-forms/uploads/php/files/91a69d756e8f60dc7959c6d87cf28162/48893955484.pdfIn PDF document text
    • https://zold-kommando.hu/files/doxuvamizoxixidikaluto.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=how+to+copy+the+best+traders+on+etoroPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012bed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BED 10804 bytes
SHA-256: 1ca1f5e64775d16c96b1bb4e8bd637ac007d5b3a6d3e0774247189b1507a1544
font_01_sfnt_off00014494.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14494 18132 bytes
SHA-256: 7010a56543aee77c95f1dcd36c740b2d332ca09e63f0fa0de86af7596b5e0ae0
font_02_sfnt_off0001737f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1737F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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