Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae658cd99c76d955…

MALICIOUS

PDF

88.9 KB Created: 2021-07-02 08:11:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c3893f52dee57cf9f5cb4fc10df11346 SHA-1: 2d5c3aecc0c9b7b77098b827b3858ed5b1d8575e SHA-256: ae658cd99c76d955d5dce9ff07a6d0e2323e6d7bf31852b127d05c206213779d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, with numerous embedded URLs pointing to potentially compromised websites, likely intended to lure users into downloading further malware or divulging sensitive information. No scripts were extracted, but the structure suggests a phishing or content-luring attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://lilit-realty.com/wp-content/plugins/super-forms/uploads/php/files/oi0u413b1bv3cop96lcvjehld3/vasererafakejapi.pdf
    • https://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f8c99495f4---femonewalizifopivumama.pdf
    • http://www.orhancoskun.com/wp-content/plugins/formcraft/file-upload/server/content/files/160de9e8a2886e---20803417949.pdf
    • http://rauvuonsach.net/images/uploads/files/xogigesawukofuj.pdf
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/160878c0b56bcf---bemituposipodetafi.pdf
    • http://novaserv.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0c390c626d---mogemobejodarutefinot.pdf
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/k9nbocolomhfvb8f4m0fvqvbpi/67966781582.pdf
    • https://xn----7sbbjg7ctfs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/96eaaa6ae3e0b399ee3e84eb700b231e/zoxibakutezim.pdf
    • http://diagonal.org.ar/wp-content/plugins/formcraft/file-upload/server/content/files/160bc6ecddcbb0---mozaxifowirozunofikuka.pdf
    • http://andrelandberg.com/userfiles/file/44972096935.pdf
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/1722169e51ad4ee3052af45755537c2d/88813517243.pdf
    • https://ivaco.it/file/purifibawivazuz.pdf
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bcf8f75655f---73363131361.pdf
    • https://krantiservice.com/ckfinder/userfiles/files/86757521622.pdf
    • http://sosnovgeo.ru/userfiles/file/51533066353.pdf
    • http://landpas.pl/upload/file/rumegan.pdf
    • https://grafitpoint.ru/wp-content/plugins/super-forms/uploads/php/files/bb6ae4af3f341a2d99119da5e623b8d3/38872689888.pdf
    • https://dotcomtravelegypt.com/userfiles/files/81825399523.pdf
    • https://stewsites.com/wp-content/plugins/super-forms/uploads/php/files/accafceba60059903757ee1650cbf5c3/kogodetimunafuxowudixumof.pdf
    • http://tpdw.pl/userfiles/file/nibafabow.pdf
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607abfae05626---34889521211.pdf
    • https://shared401k.com/wp-content/plugins/super-forms/uploads/php/files/22dfea9777467034f12cb48befc0b5bd/ziwokokamitibadufuku.pdf
    • http://www.johnknox.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1607c2bcd89a5c---zubelodafaxalupaxik.pdf
    • http://allasclub.com/campannas/file/60795344428.pdf
    • https://www.chesapeake-lighting.com/wp-content/plugins/super-forms/uploads/php/files/50e44addc524ea73c2a6f6e0e67e5504/81682516046.pdf
    • http://amajyuku.com/files/files/jujusalunakikipe.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=how+to+do+ethernet
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f77f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF77F 16792 bytes
font_01_sfnt_off00010f95.bin
4e7fa935d0654d95aa00248825cba194c677ca300a44f6042c92dd2f40b6d56a
pdf-font-stream PDF embedded font (sfnt) at offset 0x10F95 9952 bytes
font_02_sfnt_off00012581.bin
7fd18817fd2ab6da39961c921e23f6d4525b0efb5eea9155a36b76b2388daed3
pdf-font-stream PDF embedded font (sfnt) at offset 0x12581 17900 bytes