Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac96207a3f2c8e1d…

MALICIOUS

PDF

93.9 KB Created: 2021-06-27 05:04:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 448fe8d97819868da96188483aa040b2 SHA-1: 0a0d2e6b01cafa09792b58dc2a5a4f55cbbabefb SHA-256: ac96207a3f2c8e1dd38a08f59b87acce77d2d4daac0d97c31f5f4ece1d16df84
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier indicating maliciousness. It contains numerous links pointing to external websites, many of which are hosted on compromised WordPress sites or disposable domains, suggesting a link farm designed for phishing or malware distribution. The presence of 'utm_term' parameters in some URLs indicates an attempt to track user interactions with these malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9820

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://archism.ru/uplcv?utm_term=blurred+vision+after+c+section PDF link annotation
    • https://aartipalette.com/userfiles/file/laveja.pdfIn PDF document text
    • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bee9f10802---rukuki.pdfIn PDF document text
    • https://www.rowtheerne.com/wp-content/plugins/super-forms/uploads/php/files/57d6a9099136407fe342fa3fdfe5cad3/jasudowutalifomawegumikid.pdfIn PDF document text
    • https://www.vedaaz.com/wp-content/plugins/super-forms/uploads/php/files/a43441d488d2e675771333fe4e419d06/88743326377.pdfIn PDF document text
    • https://study-go.info/wp-content/plugins/super-forms/uploads/php/files/ea9da10f8852867dc2c68e9eb8964f71/14009358975.pdfIn PDF document text
    • http://sh8ke.com/wp-content/plugins/formcraft/file-upload/server/content/files/160750124882a6---86622684329.pdfIn PDF document text
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092287c0fe46---17674751164.pdfIn PDF document text
    • http://sys-svinding.dk/userfiles/file/dazewonalekunuji.pdfIn PDF document text
    • http://aeskulap24h.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a62ce38fb84---48441715459.pdfIn PDF document text
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079c3d29d291---35239060537.pdfIn PDF document text
    • http://bestforfishing.com/wp-content/plugins/super-forms/uploads/php/files/bcf6f89d641019144748c20948d0b0b8/kawagusapodosomijebivawij.pdfIn PDF document text
    • http://vhs1962.com/clients/b/b9/b967f936f519796c2a696a6ed1da67f9/File/nosemezobavadadorunase.pdfIn PDF document text
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606cd5ba75c10---jesuzego.pdfIn PDF document text
    • https://www.18fire.com/wp-content/plugins/super-forms/uploads/php/files/045cd5c4653079b6d66138bee96dfa08/53743732445.pdfIn PDF document text
    • http://huucodatlanh.com/userfiles/file/3828333448.pdfIn PDF document text
    • http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/6e9qqnrdpntki137rrofiv3vmf/taromoru.pdfIn PDF document text
    • https://ahha.az/userfiles/file/59019933153.pdfIn PDF document text
    • http://m2mus.pro/clients/b/b1/b1ca46fdb12d68e762e4a8b3318caec0/File/77292155484.pdfIn PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/e0602c5f5a17c03dffaa26f7641dab17/lajifixevubisorufifiteba.pdfIn PDF document text
    • http://premium-h.info/files/files/ditimugeg.pdfIn PDF document text
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091d6e9f38af---27529102175.pdfIn PDF document text
    • https://autosaloncenter.com/uploads/file/xupowuxibimelebidep.pdfIn PDF document text
    • https://polinagerz.ru/wp-content/plugins/super-forms/uploads/php/files/2e4b325n8gv73e3d8f25vmubfr/dafudapimobiritanilubes.pdfIn PDF document text
    • https://globalclassic.org/wp-content/plugins/super-forms/uploads/php/files/ghqapv8s4abh1pi1l8ombs8img/84345544763.pdfIn PDF document text
    • https://www.hemoroidklinigi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607573d42fd8b---xepafitapevubetobunalan.pdfIn PDF document text
    • https://whitesal.com/data/images/file/1285_20210603101153.pdfIn PDF document text
    • 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_off00010a93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A93 17868 bytes
SHA-256: 059f891c48e95492e3d1709a7e47595c429b431aad64a7b7f5d122b74d4c586a
font_01_sfnt_off000139ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139AB 10688 bytes
SHA-256: f489f201f4f87971c08f516a34d18f5161acf0482f0dbc2a3f522271d4b70cc9
font_02_sfnt_off0001525f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1525F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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