Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3260736cbb1e5e8…

MALICIOUS

PDF

67.6 KB Created: 2021-01-11 09:17:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 53516eace29302dfdd6e0418f222ba96 SHA-1: 8e29db69547d078130b65c71085cf6637256f025 SHA-256: d3260736cbb1e5e81e8e3ad11e5284dd89081c06c6e267fb3ae7e121a1771f5a
264 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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 links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • 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://cctraff.ru/wb?keyword=victorinox%20inox%20carbon%20watch In PDF document text
    • https://vasegalewi.weebly.com/uploads/1/3/4/5/134595350/kefajugapiki.pdfIn PDF document text
    • https://site-1172169.mozfiles.com/files/1172169/zukewuvoduzokujirigikig.pdfIn PDF document text
    • https://zukodefikarux.weebly.com/uploads/1/3/4/4/134498552/43cc9b.pdfIn PDF document text
    • https://kutufexefe.weebly.com/uploads/1/3/4/6/134695169/1758135.pdfIn PDF document text
    • https://site-1177042.mozfiles.com/files/1177042/late_80s_music_genres.pdfIn PDF document text
    • https://site-1171403.mozfiles.com/files/1171403/49597534253.pdfIn PDF document text
    • https://site-1175722.mozfiles.com/files/1175722/special_force_group_2_mod_apk_download_free.pdfIn PDF document text
    • https://wozijosetat.weebly.com/uploads/1/3/1/4/131407158/xijuregalevozoz_sapilenusa.pdfIn PDF document text
    • https://migomazi.weebly.com/uploads/1/3/1/4/131407029/7913848.pdfIn PDF document text
    • https://cdn.sqhk.co/zejegure/giGiihf/cloud_farm_campsite_map.pdfIn PDF document text
    • https://tanezogifa.weebly.com/uploads/1/3/4/3/134321065/gugadinuwiso_lasoxon_taletesuraz.pdfIn PDF document text
    • https://vutitikanok.weebly.com/uploads/1/3/4/7/134774074/606084.pdfIn PDF document text
    • https://cdn.sqhk.co/zevolazezag/a3Kidhb/mukizurarigixekipitulufaz.pdfIn PDF document text
    • https://cdn.sqhk.co/bogulevim/aideBif/ziwosezatafuzizililo.pdfIn PDF document text
    • https://site-1176088.mozfiles.com/files/1176088/the_nightingale_movie_2019_parents_guide.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000ca7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA7F 4940 bytes
SHA-256: e0f4fda458671221839e5e09781d9aad0d8d21d0296647272857b3910eb7579e
font_01_sfnt_off0000db65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB65 11444 bytes
SHA-256: d6930a14b264de61754677879ab55f76e17f42b7ed4edb8353ea413ea4c9d423