Malicious PDF — malware analysis report

Static analysis result for SHA-256 56acb8cad6755ec6…

MALICIOUS

PDF

73.2 KB Created: 2021-06-09 13:07:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: fa8936b41bb19a67af07f1e54f626ad8 SHA-1: edd46d52c35f22ae649b4c3a17d209724a935690 SHA-256: 56acb8cad6755ec6384eab4379881777c3cb2c06b2f01c97bc8040088f324e6a
186 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many of which are hosted on disposable domains, suggesting a link farm or phishing attempt. The document body, though heavily obfuscated, appears to be a lure related to a movie title. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://huntic.ru/pbw?utm_term=joker+full+movie+english+2019 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4416316/normal_6003c2f4052a2.pdfIn PDF document text
    • https://somomakimemabox.weebly.com/uploads/1/3/2/7/132741269/243c56dced9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366369/normal_5fed021546707.pdfIn PDF document text
    • https://pepagefowajuna.weebly.com/uploads/1/3/4/7/134738543/fetixusig_xadinap_sujafoja.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501634/normal_605bde73df5b8.pdfIn PDF document text
    • https://jejabulalirolu.weebly.com/uploads/1/3/4/4/134464322/3dd4f425.pdfIn PDF document text
    • https://sarofufi.weebly.com/uploads/1/3/0/8/130813030/bewim_govotijefuz_wukidene_zariworinodoso.pdfIn PDF document text
    • https://guvoladedesu.weebly.com/uploads/1/3/1/4/131453897/fajonovawo.pdfIn PDF document text
    • https://pojutawetuje.weebly.com/uploads/1/3/1/3/131382470/409625.pdfIn PDF document text
    • https://tixovokibena.weebly.com/uploads/1/3/4/1/134109053/rinav.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425230/normal_605014e9843d5.pdfIn PDF document text
    • https://vekibapovadivoz.weebly.com/uploads/1/3/0/8/130873848/pajobele.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454049/normal_600e6fcc87afb.pdfIn PDF document text
    • https://ruvawigalovenu.weebly.com/uploads/1/3/4/3/134318686/burup_sumogimafej_magamox_xigut.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/17bb1bfd-b438-4885-bf36-d24fa5fff3b1/dirt_devil_power_max_rewind_pet_bagless_upright_vacuum.pdfIn PDF document text
    • http://pidexuxok.pbworks.com/w/file/fetch/144603168/zaxasoxafuvodusu.pdfIn PDF document text
    • http://jumedew.pbworks.com/f/jexotozetovofowugudigeba.pdfIn PDF document text
    • http://furalagaposu.pbworks.com/w/file/fetch/144674964/gidawedabafarelujosaji.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af806a46-6408-4614-ac08-57b2ca54ecc2/zeniluwinadudimesosovog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04103723-87d3-4bee-bfb0-c6aa288c3460/86019872827.pdfIn PDF document text
    • http://pifiloxema.pbworks.com/w/file/fetch/144736914/novela_dez_mandamentos_captulo_78.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF40 5564 bytes
SHA-256: 036ac24214c635552910b8f972500848c5bc973ffd0c710ca2609ef4a34dd00e
font_01_sfnt_off0000f21a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF21A 10992 bytes
SHA-256: 4fa33025d59633062d86b9af5f7f47a4d7e1107c158b995c1f0331abd330d73d