Malicious PDF — malware analysis report

Static analysis result for SHA-256 284955128223fde6…

MALICIOUS

PDF

72.5 KB Created: 2021-09-03 15:51:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 1839594a7fec8927b45cf1c776cd15b8 SHA-1: cfefe46b879afd16413f6af8898ed70f649a62ad SHA-256: 284955128223fde66da5e81c365960830beb4dc1aaf9e0cfb3dcfee86a0e57f1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as a phishing trojan. The file contains numerous links to external websites, many hosted on compromised CMS platforms or disposable domains, suggesting a phishing or malware distribution campaign. The presence of embedded URLs and the overall structure indicate an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9915

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=battery+doctor+charger+manual PDF link annotation
    • http://shipagents.nl/uploadfiles/file/pegiwilopomifijidefe.pdfIn PDF document text
    • http://a1-automotivegroup.com/upload/files/92834993191.pdfIn PDF document text
    • http://villa-carlshorst.de/sites/default/files/file/13354881494.pdfIn PDF document text
    • https://www.ezhealthcheck.com/wp-content/plugins/super-forms/uploads/php/files/qndi85rpiovu6ofcgm4gqi9sua/41578848890.pdfIn PDF document text
    • https://xn----8sbcehyodmtf1czh.xn--p1ai/userfiles/file/sobogewokegonuraw.pdfIn PDF document text
    • https://bentzendesign.se/wp-content/plugins/formcraft/file-upload/server/content/files/160a627b0a4320---vemamageraruvemetegojul.pdfIn PDF document text
    • https://www.baileysmilk.com/wp-content/plugins/super-forms/uploads/php/files/0968e70dccbccd0b793c4bb3440e27d1/sorekolunigigatizo.pdfIn PDF document text
    • https://szekszardportal.hu/userfiles/file/rodugarapevotogagenude.pdfIn PDF document text
    • https://karinbentum.nl/uploads/file/dikosimokozofa.pdfIn PDF document text
    • http://mixmarketing.vn/upload/fck/file/22213574564.pdfIn PDF document text
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071f5f5ca654---bifiredafitifuvelewojimi.pdfIn PDF document text
    • http://hanabi-la.com/uploads/files/13558790967.pdfIn PDF document text
    • https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/160839ffd3f90f---torisazigelimogakiv.pdfIn PDF document text
    • http://cosyromania.com/media/file/5037994927.pdfIn PDF document text
    • https://mkting.com.co/wp-content/plugins/super-forms/uploads/php/files/56111068d989bed4ac14660d8c698b05/niful.pdfIn PDF document text
    • http://cfh2.com/clients/d/d2/d2a7b52150a7a947468b52e9b7560e3c/File/75828639759.pdfIn PDF document text
    • https://artasedanasingaraja.com/uploadfck/file/929770654.pdfIn PDF document text
    • https://nowbali.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/1607e8f953f96f---bexagolumujelodabeboxop.pdfIn PDF document text
    • http://cricalliance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160742a5d095d8---wejupukabajoguganoriwumux.pdfIn PDF document text
    • http://albatrossmrn.com/konadnew/userfiles/file/20613812078.pdfIn PDF document text
    • https://mn-lawfirm.com/box/userfiles/file/vukosidenurajinewobudon.pdfIn PDF document text
    • https://www.alarisusallc.com/wp-content/plugins/super-forms/uploads/php/files/eeeca3c8415658c44e81bcde4ef4c75e/siwuralep.pdfIn PDF document text
    • http://www.sbawerribee.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160728623ad83e---dakasobavik.pdfIn PDF document text
    • https://www.southdownscellars.co.uk/ckfinder/userfiles/files/70686518205.pdfIn PDF document text
    • https://businesslife.com/content/file/70579700317.pdfIn PDF document text
    • http://asirakademi.com/resimler/files/22645981038.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_off0000bd70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD70 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d582.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD582 15092 bytes
SHA-256: 1ee3f057d251602a2509d9bacaadd1d6349378abe71b057fe2dda2472df5f99f
font_02_sfnt_off0000fb8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB8F 10824 bytes
SHA-256: e1dd4428b38b568c361b5b29add3ea0a4e03b2abef44e3ff86ddc5e5da15bcc5

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