Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c9a6fd11883fb04…

MALICIOUS

PDF

76.0 KB Created: 2021-09-20 23:50:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 9ea11557bfb234adfc2eaf58f86bba79 SHA-1: bb3608142fe0c5f299bbcb473cf0d9d08f5c4f32 SHA-256: 2c9a6fd11883fb047e625bf8f374d82ce7bb577787437a30175db07b2ce0ac64
156 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://coretry.ru/uplcv?utm_term=vidmate+android+download+free PDF link annotation
    • http://vlaamspatientenplatform.be/_plugin/ckfinder/userfiles/files/fovafopitobasone.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613334f72a129---gurilavumukimamapiva.pdfIn PDF document text
    • http://holmeslawfirm-iowa.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/repanawuwulawut.pdfIn PDF document text
    • http://sonnenheizung.ch/fckeditor/editor/images/file/xevitetazoloniwipiset.pdfIn PDF document text
    • http://idrogastermoclima.it/Utentifile/FCKPage/file/safonamowanu.pdfIn PDF document text
    • http://geologocarmignani.com/userfiles/files/xuxaxozobegitisajiporide.pdfIn PDF document text
    • http://ckrestaurantgroup.com/ckfinder/userfiles/files/41490045494.pdfIn PDF document text
    • http://immobilieninvestors.de/userfiles/file/72156814351.pdfIn PDF document text
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16145c11e6d7df---69172323049.pdfIn PDF document text
    • http://amidoux-peintures.com/ckfinder/userfiles/files/92207783413.pdfIn PDF document text
    • http://altera.ukrstroyka.com/content/xuploadimages/file/wotaxotejowuvig.pdfIn PDF document text
    • http://thebankcardservices.com/uploads/files/gulik.pdfIn PDF document text
    • http://raduzhniy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612fd445174a5---dulaxezakajolike.pdfIn PDF document text
    • https://www.marjojaspers.nl/ckfinder/userfiles/files/nojogovebimu.pdfIn PDF document text
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1613fea92cdfe1---85868092977.pdfIn PDF document text
    • https://dollarplus98.com/images/upload/files/48553159609.pdfIn PDF document text
    • http://teamtrinity.net/trinitya/file/20767271171.pdfIn PDF document text
    • https://makojudo.pl/zdjecia/fck/file/37543049760.pdfIn PDF document text
    • https://www.natursany.com/ckfinder/userfiles/files/piwolorivom.pdfIn PDF document text
    • https://kisikana.hr/userfiles/file/82769357348.pdfIn PDF document text
    • https://girl0229960192.com/upload/users/files/96625271015.pdfIn PDF document text
    • http://cioccolatogallucci.it/userfiles/file/fitapufuse.pdfIn PDF document text
    • https://ckmusicdesign.nl/userfiles/file/funikidox.pdfIn PDF document text
    • http://saipanbooking.com/FileData/ckfinder/files/20210916_A6D0ED4EBE796C54.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_off0000c7a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7A9 10400 bytes
SHA-256: 95abe37d5792f776f102d3b1dfcbd186c1c72733b0bd9c73b4101e7868697763
font_01_sfnt_off0000df32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF32 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f744.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF744 16904 bytes
SHA-256: 257dc35cc571986451a586474c54bce236bf3eebbdefd7c0cc7fdb948dc1c4a8

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