Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb26f61cf513b87a…

MALICIOUS

PDF

68.0 KB Created: 2021-09-16 08:56:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 8db7064435f549403a4601ab94e791d9 SHA-1: ed9a395a5ac175fe094692cb361d5529cedfadb9 SHA-256: eb26f61cf513b87a244a5a634b5e6303dcf8e8015c56b54087d7d90a1026ddc2
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file exhibits characteristics of a phishing lure, employing a link farm with multiple URLs pointing to potentially compromised domains. The presence of embedded JavaScript and the 'Image-only document with action trigger' heuristic suggest an attempt to deceive the user into clicking malicious links. The ClamAV detection and ML classifier further support its malicious nature, likely serving as a phishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 67 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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 http://www.ezmoving.com/file/nawapisegalipuveponura.pdf In PDF document text
    • http://artpolyclinic.com/file/files/pazexosikekavoxixaxovik.pdfIn PDF document text
    • http://muasamhangmy.com/ckfinder/userfiles/files/76908812382.pdfIn PDF document text
    • http://akcompany.vn/uploads/userfiles/file/70372769410.pdfIn PDF document text
    • http://labotinnghia.com/img/files/lemifuzoromiparis.pdfIn PDF document text
    • http://chrisdepanneservices.com/Sites/cds/files/mutowuluwuna.pdfIn PDF document text
    • https://inverpalmas.com/aym_image/files/sotag.pdfIn PDF document text
    • http://union.travel/ckfinder/userfiles/files/zevamipebe.pdfIn PDF document text
    • http://elitakhealing.com/ckfinder/userfiles/files/60576090231.pdfIn PDF document text
    • https://freedomtampons.com/wp-content/plugins/super-forms/uploads/php/files/ac28cfa497e1e43ff284e1f7bf1c758b/59398934244.pdfIn PDF document text
    • http://learnazia.com/fck/imagesfile/fuzazizolugumitutig.pdfIn PDF document text
    • http://hoangminhsaigon.vn/@dmin/js/ckfinder/userfiles/files/wemejigumizen.pdfIn PDF document text
    • http://rvhifi.cz/files/file/6663508307.pdfIn PDF document text
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/161393f37f1eea---88937483454.pdfIn PDF document text
    • http://santeh.md/img/files/risigoduwop.pdfIn PDF document text
    • http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f642117126---sabupaduma.pdfIn PDF document text
    • http://zeci.nl/im/image/dosabativu.pdfIn PDF document text
    • http://kimura-shihoshoshi.com/userfiles/file/nevigevagazuponopano.pdfIn PDF document text
    • http://gesundezellen.com/neu/userfiles/file/9114719604.pdfIn PDF document text
    • http://borneneskontor-landsforening.dk/userfiles/file/kapijuwinu.pdfIn PDF document text
    • https://jaunimodienos.lt/wp-content/plugins/super-forms/uploads/php/files/e2hebvmkmops395lp8qi867cs1/46558011376.pdfIn PDF document text
    • http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613405063e0f9---xenefefedikonegomit.pdfIn PDF document text
    • http://themetamorphoseprogram.com/userfiles/file/jepududateferaxakejigi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=how+to+see+a+private+account+posts+without+followingPDF 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_off0000ae71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE71 13936 bytes
SHA-256: be6737602d081820549b412f9ebe8c6fe91c452c8e37b081d7817b4f9d26d763
font_01_sfnt_off0000d094.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD094 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e8ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8AB 11004 bytes
SHA-256: b8bbaf995e29378ac901a19f5b2463cbc513c38fd4f30cb5a25354a8ff2dd87a

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