Malicious PDF — malware analysis report

Static analysis result for SHA-256 037a1ad32863fa24…

MALICIOUS

PDF

80.0 KB Created: 2021-04-05 02:35:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: d4828651b453f707902c7aff985db24e SHA-1: c98abd2f61fad553d1e4353c7a118d69375f25e2 SHA-256: 037a1ad32863fa243817ec1fccb7d78c86aa234a542b7b5996f852b560f338db
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://leonvi.ru/strik?utm_term=define+particle+wave+in+physics PDF link annotation
    • http://giocodigital.fun/27884485917mmxva.pdfIn PDF document text
    • https://cdn.sqhk.co/reriwoduriju/fxjgyhb/movistar_peru_tv_azteca.pdfIn PDF document text
    • https://cdn.sqhk.co/xakurusuk/Pihgehh/turn_off_data_roaming_notification_moto_z.pdfIn PDF document text
    • https://cdn.sqhk.co/jarebomu/gfgdvjj/rojimupazuti.pdfIn PDF document text
    • http://reabook.online/rstudio_cheat_sheet_regextnj1k.pdfIn PDF document text
    • https://cdn.sqhk.co/butemobe/doeWSpY/rugby_league_grand_final_2020_kick_off_time.pdfIn PDF document text
    • http://1xbets-regs.site/waviwememuxinojuvafaluxtxr3.pdfIn PDF document text
    • http://quinzsy-studio.design/208680336514ov1g.pdfIn PDF document text
    • http://consumer-data-protection-bureau.com/beretta_m9a1_accessoriesxc82n.pdfIn PDF document text
    • https://cdn.sqhk.co/bemaxopig/ehdoide/29736033935.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://b1394492-4877-47b1-8bf2-e962974baa99.filesusr.com/ugd/3e4b7a_c2717cd1d2404c9aa586990a1a4be30a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/ragejufa/85835336431.pdfIn PDF document text
    • https://s3.amazonaws.com/faduxodiwo/70912687460.pdfIn PDF document text
    • https://9e730ba1-499c-413e-9a09-8a81f8121270.filesusr.com/ugd/0a0016_3c822505b6c040f596dfc5feaf9c44cd.pdf?index=trueIn PDF document text
    • https://b304dada-1952-41b2-af44-d16a3232bb3f.filesusr.com/ugd/c19c34_4ea93e87739d4f968702e904a1ab976b.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f8b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8B5 5356 bytes
SHA-256: 7b0fdcf86c6350c11d96ed375a034b54c6a086e70a72ec0c93eb7fe5793d2bf8
font_01_sfnt_off00010b0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B0B 11804 bytes
SHA-256: 28a5fe2548fa7c9dd6b78b6743aba562a783384309b3c5985854ed7046842083

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