Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ab68497c16215ec…

MALICIOUS

PDF

102.0 KB Created: 2021-07-02 06:00:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a6449187e8eeba6ee9fce171eb5412d6 SHA-1: db8ca02f66478ce8dd9974feca904b5fd594e9e2 SHA-256: 7ab68497c16215ec3b63d6170a8a1af7b3d78010ee0feb9adbb33c0927358d40
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, directing users to multiple external websites, some of which are hosted on compromised CMS upload storage. The presence of embedded URLs and the overall structure suggest an attempt to lure users to malicious sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9887

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 https://lederstuhlshop.de/ckfinder/userfiles/files/50968358663.pdf
    • http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a22edd3a8c4---74035311770.pdf
    • https://chefinhogourmet.com/wp-content/plugins/super-forms/uploads/php/files/366d5f51e6f245371a20eab6069f7bea/4513062954.pdf
    • http://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a304e2a9ad0---sexorebogifukafuri.pdf
    • https://hondamienbac.vn/userfiles/file/10158443657.pdf
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c84cb168e3f---votixalefozereriniwax.pdf
    • http://simonide.org/userfiles/file/robuzemokilasamu.pdf
    • http://scro.ru/pic/file/89982816236.pdf
    • http://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/l1dvlkccs2h42lu8d25q9s2bh1/55432176427.pdf
    • https://kindliving.org/wp-content/plugins/super-forms/uploads/php/files/tmp/43137857367.pdf
    • http://paradisoseminatrici.it/userfiles/files/10676824763.pdf
    • https://chefinhogourmet.com/wp-content/plugins/super-forms/uploads/php/files/766df45517f8bc965f33a7feabf2e2a6/xovegivokudedoguto.pdf
    • https://tangente-mag.com/img/file/sobilol.pdf
    • https://comodee.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a60d5631202---letekuvoxurenetogi.pdf
    • https://t2sc.me/userfiles/lawanijuw.pdf
    • http://www.deopendeur.org/imgUser/file/kikamaxukinibos.pdf
    • https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c128a59f0b8---64065878415.pdf
    • https://www.dynasil.com/wp-content/plugins/super-forms/uploads/php/files/565e152fbd819a0bdc369df4996a495a/51982479801.pdf
    • http://beautybybelief.com/admin/images/file/67566131059.pdf
    • http://english-island.pl/wp-content/plugins/super-forms/uploads/php/files/mt53fkbklijkl8ha3h1lhmn415/xugobakiwowedun.pdf
    • http://mariopresto.pl/userfiles/file/ragabokafisusi.pdf
    • http://sahrugs.com/userfiles/file/xogenivubidodegabowedij.pdf
    • http://bydnjl.com/userfiles/files/52888051022.pdf
    • http://ats-dz.com/userfiles/file/fobivuguvaxu.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608bb5fcb5342---4024013850.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=describe+yourself+yahoo+answers
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001166a.bin
62ca2da5f140b6661accf23bd51c2938112a103acc020effa5a548a70d241cb1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1166A 17436 bytes
font_01_sfnt_off00014448.bin
f4c78550353c5df288ce90871ddb3e91edf36117f40ff605d87f1770b6de70f0
pdf-font-stream PDF embedded font (sfnt) at offset 0x14448 10776 bytes
font_02_sfnt_off00015d1e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x15D1E 16792 bytes
font_03_sfnt_off0001752b.bin
a773c3272c0f8b98c08ecc5e7dbc86d70e231261cded7626c193d24e6d37494d
pdf-font-stream PDF embedded font (sfnt) at offset 0x1752B 5356 bytes