Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ae594a413f2a160…

MALICIOUS

PDF

95.9 KB Created: 2021-05-11 21:55:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 7ce9e31ed3f586ad4204e44f11c919db SHA-1: 29e2da78c955aa244b94acc73541424d55c94d2f SHA-256: 7ae594a413f2a160edda985098d123902fce595814f5b3ca132addd5855babba
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, indicating a link farm or SEO manipulation tactic. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of malicious activity.

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://vilenefex.ru/strik?utm_term=kyocera+ecosys+m2040dn+manual PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4497110/normal_5fe20284393b8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485927/normal_5fda70e3bb349.pdfIn PDF document text
    • https://jagedebake.weebly.com/uploads/1/3/0/7/130738918/dabonedenapejolu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420430/normal_601e4945ef89e.pdfIn PDF document text
    • https://dopovebo.weebly.com/uploads/1/3/4/4/134431975/tumufo.pdfIn PDF document text
    • http://dutilulamav.iblogger.org/trastornos_alimenticios_anorexia_y_bulimia.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481673/normal_5fd1e248454c0.pdfIn PDF document text
    • https://zarogamotelim.weebly.com/uploads/1/3/4/3/134344532/dusikeginir.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412159/normal_5ff13a7559964.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404965/normal_602abee41b5a4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418381/normal_60691fbf2b2f1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380383/normal_604db7e873a28.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://raziwisubuza.rf.gd/what_channel_is_the_fire_log_on_directv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5cad2e3-8afd-4bac-b1b7-3a8f64fc6b91/what_stocks_to_buy_now_motley_fool.pdfIn PDF document text
    • http://buweweja.epizy.com/fekexuponovifuburito.pdfIn PDF document text
    • http://wozowopug.rf.gd/tixifetifuzetesapajunazer.pdfIn PDF document text
    • http://fipuzugajan.epizy.com/castellan_40k.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a4fdfb6-2de9-4006-b8c9-62fd86f2f305/jitibojigabapiwawi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd9c3dfd-60e7-4a29-9c84-1a3aca9111ba/getugufavuxevemamezuf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/404112d9-c38c-41a6-9d57-7204aed77323/zoguvexubedowawowonujiwa.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011d61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D61 2932 bytes
SHA-256: 586487a678dcceff0e9049cfe7e2af8db34db0f35a85b1b03b350e8de7ccbcff
font_01_sfnt_off000127e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127E2 5272 bytes
SHA-256: 06ae69d190813f12fb505b6e1f284b137022dd4015e786509607f865d8c645fd
font_02_sfnt_off000139b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139B2 13440 bytes
SHA-256: e38728b1ab643f0abfadd3f469f305f3cb215926e3c6f18c0983c7bd2dcfac76
font_03_sfnt_off0001636e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1636E 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361