Malicious PDF — malware analysis report

Static analysis result for SHA-256 32c0e4d6985d0eb3…

MALICIOUS

PDF

82.0 KB Created: 2021-09-05 14:47:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: afb90a5e12c27e0a7c99d163af31a0ca SHA-1: d5f289f5024ada462ecc2d67ee78f56831c35b85 SHA-256: 32c0e4d6985d0eb31e88fa4b7cb4b398b67f2815e97e7a36d1273d26967a652b
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics as a link farm, directing users to numerous domains, some of which are hosted on compromised CMS uploads or appear to be disposable. The ML classifier and ClamAV also strongly indicate maliciousness, consistent with phishing or malware distribution. No scripts were extracted, and the document body was unreadable binary data, suggesting the primary malicious function is to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

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://xn--3e0b556bhrbowi6undva.com/ckupload/files/pepitadetuvujupexovewoko.pdf In PDF document text
    • https://autoradiator.mn/uploads/ckfinder/files/26025299774.pdfIn PDF document text
    • http://nhatrangpalace.vn/app/webroot/upload/files/rujasenozaxudakikofix.pdfIn PDF document text
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/16083d8fcb0ee4---88075397088.pdfIn PDF document text
    • http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160810381aff0d---tizobafitufonugukifelog.pdfIn PDF document text
    • http://klick-tipp.at/ckfinder/userfiles/publics/files/24786202359.pdfIn PDF document text
    • https://karinbentum.nl/uploads/file/zekiwaxasuteso.pdfIn PDF document text
    • https://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/9nbufsl3gs80nm43v38ur5nu4i/14787839004.pdfIn PDF document text
    • http://dabaizhongxue.com/upload_fck/file/2021-5-16/20210516065939557442.pdfIn PDF document text
    • http://rafaelokazakov.com/file/54004537890.pdfIn PDF document text
    • http://bibliotekaszamocin.pl/img/upload/files/kepibofefokorevaw.pdfIn PDF document text
    • http://photo-preiss.com/upload_files/files/86991428622.pdfIn PDF document text
    • https://asiatravel.kg/wp-content/plugins/super-forms/uploads/php/files/4a781e9816960d760b73fd306a9865ba/fapoze.pdfIn PDF document text
    • http://gerocuki.hu/user/file/folirovifavexujajufiwirit.pdfIn PDF document text
    • http://neodev.space/wp-content/plugins/formcraft/file-upload/server/content/files/1608bbbce35a0c---83100860785.pdfIn PDF document text
    • http://ljhalls.com/wp-content/plugins/super-forms/uploads/php/files/6c8a28d432353f7bb7d3e79628efeb6a/kugozoxunudawifunewu.pdfIn PDF document text
    • http://associacaoguainumbi.org.br/wp/wp-content/plugins/formcraft/file-upload/server/content/files/1607fa3abbb125---zaropizarawisete.pdfIn PDF document text
    • https://razdolle.by/wp-content/plugins/super-forms/uploads/php/files/et3cro25rufp7r8qq5kqg3jd04/72073832548.pdfIn PDF document text
    • https://hantverksakuten.se/ckfinder/userfiles/files/fomuf.pdfIn PDF document text
    • http://renovator.cz/files/file/14882061969.pdfIn PDF document text
    • https://sssmri.com/ckfinder/userfiles/files/semaveveruduvujujodidureg.pdfIn PDF document text
    • http://mudrberanova.cz/userfiles/file/puxuvaduwidipodomepaba.pdfIn PDF document text
    • https://bechtoldpaving.com/wp-content/plugins/super-forms/uploads/php/files/61b261510ad33cffa4037b378525ebbf/92517687023.pdfIn PDF document text
    • http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a41f94495da---87635278801.pdfIn PDF document text
    • https://carpanea.it/wp-content/plugins/super-forms/uploads/php/files/6472ae2b45ba26174cd7397d04e0a02b/wevogudidalagesivafunu.pdfIn PDF document text
    • https://www.ideaklinikizmir.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076fafda9843---90524525695.pdfIn PDF document text
    • http://bahtiyardishekimi.com/fckfiles/file/roxorevuvo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=trimline+treadmill+3610+manualPDF 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_off0000d7f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7F0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f002.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF002 18776 bytes
SHA-256: 9c8e7ecce381ed0f59eccc0d8826ed713c339fd7e38fefa1d3dc9cb3c484d14d
font_02_sfnt_off00012137.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12137 10696 bytes
SHA-256: 66e38f589d320c24862ce0403f7e501744ddd5911dd6c7a260d8e5d11b8ea942

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