Malicious PDF — malware analysis report

Static analysis result for SHA-256 699801149c50ce31…

MALICIOUS

PDF

88.1 KB Created: 2021-03-20 03:00:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: d0202a947fb30779a99b7e020f12c9ed SHA-1: cc3afd7ccac9747bb6470aab651b2088dd908d33 SHA-256: 699801149c50ce310181c7c7a51558144d1b76aa409fed3482b340de17005ea9
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file is identified as malicious by multiple heuristics and a machine learning classifier, with ClamAV detecting it as a phishing trojan. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO manipulation tactic. One prominent URL is https://kuzutuzo.ru/strik?utm_term=shepherd+the+flock+of+god+jw+book, which is likely the primary lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://kuzutuzo.ru/strik?utm_term=shepherd+the+flock+of+god+jw+book PDF link annotation
    • https://dilipifoson.weebly.com/uploads/1/3/1/0/131070096/nasusaf.pdfIn PDF document text
    • https://cdn.sqhk.co/bafiweba/iiVKjas/voltage_drop_formula_uk.pdfIn PDF document text
    • https://xowarumi.weebly.com/uploads/1/3/4/5/134519529/madawewol.pdfIn PDF document text
    • https://gegoviboz.weebly.com/uploads/1/3/4/8/134876631/kofid_sorumotofa.pdfIn PDF document text
    • http://allieshouseofhope.com/12156477858swb5w.pdfIn PDF document text
    • https://cdn.sqhk.co/gunonutib/Gaajb5q/kopa_shamsu_meaning.pdfIn PDF document text
    • https://jubunukaf.weebly.com/uploads/1/3/1/4/131483214/dotikirexurun.pdfIn PDF document text
    • http://gufutaca1.xyz/fogukorubizobfirj4.pdfIn PDF document text
    • https://cdn.sqhk.co/reriwoduriju/ifbijge/happy_jumps_party_rentals_oxnard_ca.pdfIn PDF document text
    • https://cdn.sqhk.co/sosobita/icidNnb/50672492104.pdfIn PDF document text
    • https://cdn.sqhk.co/salobosemiv/ghFhjvf/76227586229.pdfIn PDF document text
    • https://gewasulupav.weebly.com/uploads/1/3/0/7/130740056/vokom.pdfIn PDF document text
    • https://cdn.sqhk.co/vasozaponem/jgejf5T/ice_cream_roll_maker_amazon.pdfIn PDF document text
    • http://gdztut.com/ipod_nano_6th_generation_will_not_turn_offxxx9p.pdfIn PDF document text
    • https://cdn.sqhk.co/bowazeduz/erhjcij/foxobidoniveg.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://ebba3e40-d49f-4cc8-b137-373bb1124918.filesusr.com/ugd/384ea4_deb19793bd5549cb949f4ba6489a0014.pdf?index=trueIn PDF document text
    • https://7893bdd6-41e4-48f6-9953-3a636dfb5d61.filesusr.com/ugd/c5c63b_f67c9270cd44405faf77e7f662e98131.pdf?index=trueIn PDF document text
    • https://71347f20-8353-4153-bebc-dd2a28b3a5cf.filesusr.com/ugd/a382ee_bfa44bc41e9140f9933b09495169240e.pdf?index=trueIn PDF document text
    • https://770ad53b-b55e-4e58-b1eb-3709f41304f7.filesusr.com/ugd/98e298_4261aaeeb11e41039edecaf220f76587.pdf?index=trueIn PDF document text
    • https://6b2d4799-12fc-456d-8881-596234ac9a0a.filesusr.com/ugd/ae8ff6_61e69c2228c24d83adc5d855ffe51180.pdf?index=trueIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000119fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119FA 5504 bytes
SHA-256: 0f20fa18ba93d4d0a457abc1cf3af5056288f8def7251bcd66ce5d5b9cd97eed
font_01_sfnt_off00012cc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CC4 10824 bytes
SHA-256: 7bde2182fd53b3ec8b687e9d2dc140631586f849a656b271af698c0563cd40aa