Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2a32717c4ea7061…

MALICIOUS

PDF

81.8 KB Created: 2021-09-23 12:24:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 95b7b69aad995427c4e8a3ab90ebdbfa SHA-1: b49fee2f53045b4824e0f49231efd37bf4dcc2ac SHA-256: c2a32717c4ea706125ad79605de43d243f761606a25abfdeb17ad55fb0e99941
224 Risk Score

Malware Insights

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

The PDF contains lures for advance-fee scams and fake invoices, directing users to download further malicious content. Multiple heuristics indicate the document is designed to host and link to malicious PDFs, with several URLs pointing to compromised CMS uploads or disposable hosting. The ML classifier and ClamAV detection strongly suggest malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 9

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://liccuza.ro/stiri_files/file/judirobafabakezawojiwa.pdf
    • http://koszyczarek.pl/userfiles/file/tesukepubapaduluduj.pdf
    • https://archcosmeticstudio.com.au/wp-content/plugins/super-forms/uploads/php/files/bd48e0528dbb6eca4078fc1167d0826f/52743989427.pdf
    • http://chaukitchen.com/uploads/files/877335584.pdf
    • http://phutungototuanphat.com/img-tvdl/files/54195673532.pdf
    • http://atek-ent.com/upload/file/62233776768.pdf
    • http://zenithmetals.com/files/67015551054.pdf
    • http://hoteldanang.com/uploads/images/files/33213271897.pdf
    • http://portaldeaquidauana.com.br/ckfinder/userfiles/files/kiwuwope.pdf
    • http://onthebroadway.com/CPD/adminpanel/upload/file/81506039455.pdf
    • http://ninda.vn/userfiles/files/sajez.pdf
    • https://elesud.it/img_pagine/file/71087181777.pdf
    • https://www.quatainvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1612f99c06946a---15162450719.pdf
    • http://ncdesign.it/userfiles/files/vujopabojona.pdf
    • https://netshopnepal.com/userfiles/file/nowewotigigolaselovevexo.pdf
    • http://cageart.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1613632caeb07c---vafaziporuburujuxazodi.pdf
    • http://metapolar.hu/tmp/zawutavutorokozopoburox.pdf
    • http://illinoislivestock.org/userfiles/file/16035013526.pdf
    • http://211.129.1.225/system/ckfinder/userfiles/files/62986481327.pdf
    • http://gutachterbewertung.de/userfiles/file/wiwevoxaduvatogadumidimew.pdf
    • http://ttworld.hu/uploads/content_files/files/50682826345.pdf
    • http://f1-rennsimulatoren.de/userfiles/file/91764257871.pdf
    • http://diplomat2014.ru/ckfinder/userfiles/files/supuwufejawepew.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=3+letter+starting+with+e
    • 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_off0000dc50.bin
8750fc89dfffb92add9f71bf97cb9a20a85117413570a422d71b1a5534575d51
pdf-font-stream PDF embedded font (sfnt) at offset 0xDC50 10428 bytes
font_01_sfnt_off0000f3e7.bin
0bdcd5cf422ed07ba48c2b0dc3e6be4f96edf3ad5eefafb276b151325e134f35
pdf-font-stream PDF embedded font (sfnt) at offset 0xF3E7 17708 bytes
font_02_sfnt_off000121fc.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x121FC 16792 bytes