Malicious PDF — malware analysis report

Static analysis result for SHA-256 183ae965c65adadb…

MALICIOUS

PDF

81.0 KB Created: 2021-08-28 06:07:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 52de67a95d807aa792104ecca4a7552f SHA-1: 93ec4a00250ac5e2e7fe572988ae4d1b863ba296 SHA-256: 183ae965c65adadb791ee8b8120847a82903f49118092ccee3dd1c520fba8e53
156 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many pointing to compromised WordPress upload directories, suggesting it's designed to lure users to malicious sites. The file's structure and link farm characteristics indicate a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9940

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160847a2f3c088---dupoj.pdf In PDF document text
    • https://office-agglo-larochelle.fr/userfiles/file/wujifotonefejibigewuluf.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082187fc4966---derini.pdfIn PDF document text
    • http://abwessex.com/uploads/files/19294577892.pdfIn PDF document text
    • http://penoplex24.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a5bc13130a7---xebawo.pdfIn PDF document text
    • http://philippinesroadshow.com/wp-content/plugins/super-forms/uploads/php/files/c13f3adaad4ad01517b64f77da521e08/jexomosuzazorov.pdfIn PDF document text
    • https://christembassyromford.org/wp-content/plugins/super-forms/uploads/php/files/24c9a51577381c30db75f7dcd1cf1948/ranotubenofe.pdfIn PDF document text
    • http://johnmarzillier.com/ckfinder/userfiles/files/33167667716.pdfIn PDF document text
    • https://www.zulilighting.com/wp-content/plugins/super-forms/uploads/php/files/eb475bdd1c41f34c524761a9cee02af3/69063257089.pdfIn PDF document text
    • http://immopolignano.lu/images/nidudorilakiwi.pdfIn PDF document text
    • https://locktactyuma.com/userfiles/file/95520346536.pdfIn PDF document text
    • http://auroraenergyproject.it/userfiles/files/60910953809.pdfIn PDF document text
    • https://argumentua.com/i/file/sotanimus.pdfIn PDF document text
    • https://xn----7sbabak5acz7byau.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/0deeba33384a6cbed77836537434fea7/36771632741.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fdc269d4331---gutojese.pdfIn PDF document text
    • https://atlaskvartir.ua/data/uploads/files/54417234615.pdfIn PDF document text
    • https://olympicwroclaw.pl/zdjecia/fck/file/wosanukobof.pdfIn PDF document text
    • https://www.getfitcrew.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f030798bd3---31442367807.pdfIn PDF document text
    • https://isosklo.cz./uploads/lowolari.pdfIn PDF document text
    • https://sunnyrosesschool.com/userfiles/file/3690702585.pdfIn PDF document text
    • http://tremonttemplemacon.com/clients/862779/File/55212501043.pdfIn PDF document text
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b05a9c181a3---vavupif.pdfIn PDF document text
    • https://mkting.com.co/wp-content/plugins/super-forms/uploads/php/files/d13ff84a9894215e9888e9ea38b8c581/38652218618.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=transfer+kindle+book+to+pdfPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c1e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC1E6 16632 bytes
SHA-256: e896d0c9c6509c93731645541c0836c845742b74f7fde2e8ff5e94baacc6a6a0
font_01_sfnt_off0000d973.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD973 17144 bytes
SHA-256: 6f39280461dc3c36472dfd57177c9b12b298e239476570fb4e316707d0c1a78e
font_02_sfnt_off00010621.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10621 10684 bytes
SHA-256: d77c98e4e51579339210a7b22f3253de35fdd21449199d3796c8712e6b33e14e
font_03_sfnt_off00011e80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E80 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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