Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e016799bce848fa…

MALICIOUS

PDF

93.2 KB Created: 2021-07-04 23:06:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 53c2172f2ebef559a2bce2747f10adfd SHA-1: ede04d81b9acc9a495d55d74740bde57ace3786f SHA-256: 5e016799bce848fa041a621d3ba7109870d3d6018ee1dc4de12d62ee333aab77
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 ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery via embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://oniceh.ru/uplcv?utm_term=anti+dumping+countervailing+duties
    • http://keralabiblesociety.com/fck_uploads/file/pimozezojibufabi.pdf
    • http://www.ecostroyservis.ru/File/64371114635.pdf
    • https://hondamienbac.vn/userfiles/file/mutivabemepajobugeza.pdf
    • https://rybczewice.pl/userfiles/file/98607756991.pdf
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/1fb06bf84aafdc93bdc769cf7dfac110/bokorizo.pdf
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/82emsvvtvtvhk80vmovqgmsms5/69025845083.pdf
    • https://roadtoring.com/wp-content/plugins/super-forms/uploads/php/files/d02e86dcb37bd2e2d413e4fcbfd4b45c/zilisoberivugilusavoro.pdf
    • http://orvosvalaszto.hu/uploads/files/52219842.pdf
    • http://cesurmakina.com/userfiles/file/27924953447.pdf
    • https://www.ideaklinik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160a1472762d5e---98639448370.pdf
    • http://jointrilogy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ea518e5768---bafikop.pdf
    • https://www.chortho.co.uk/wp-content/plugins/super-forms/uploads/php/files/ukfski1hspeh8niab3gc9sieuj/92771455459.pdf
    • https://www.truegridpaver.com/wp-content/plugins/super-forms/uploads/php/files/3a074a2cda4c287b020ee36c87265d6f/49040909372.pdf
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607b44050e7fc---levopizodulajitowuf.pdf
    • https://deedpoll.sg/wp-content/plugins/super-forms/uploads/php/files/7e5fe7fd583172e0887628d1f7f080a7/radiwajuduvovika.pdf
    • https://www.endthestigmacounselling.com/wp-content/plugins/super-forms/uploads/php/files/eh7kvr1tfbq530hg869h19gt67/roveguvaju.pdf
    • http://ventilyatsia-v-sochi.ru/ckfinder/userfiles/files/jupezawiluzozimakipub.pdf
    • https://fermuar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6907f05149---89229876075.pdf
    • https://www.ezhealthcheck.com/wp-content/plugins/super-forms/uploads/php/files/gkst9ahvhsqoi7nsjimafq292i/visererapuv.pdf
    • http://poiskvod.ru/images/file/togewegagenudexarogove.pdf
    • http://ffarchitettura.it/userfiles/files/46935647011.pdf
    • http://asesorgubernamental.com/images/file/xadegimobepuv.pdf
    • http://hoanggiaphatland.com/uploads/image/files/63892963256.pdf
    • 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_off00010833.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10833 16792 bytes
font_01_sfnt_off00012045.bin
bb00a5fc49fac996c326297de8d5bf0d72dbdc5e0b3ca8ed6f8ae4c56c222245
pdf-font-stream PDF embedded font (sfnt) at offset 0x12045 17516 bytes
font_02_sfnt_off00014e3b.bin
d8ec07e74e7772f376f83a1ed7d59fe94f5ad0e99a682084e8dca5a3f27c4bb2
pdf-font-stream PDF embedded font (sfnt) at offset 0x14E3B 11004 bytes