Malicious PDF — malware analysis report

Static analysis result for SHA-256 b179d5b25218c274…

MALICIOUS

PDF

73.6 KB Created: 2021-03-21 07:12:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 2bf026a25de909b87ae7d8b927190dd0 SHA-1: 5436fd70cbd51441e1fc91729d2c9c5d45b052ab SHA-256: b179d5b25218c274bb38eb716c62d9942b9567816b15e59b076e4e4cecb0abe8
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9999

Heuristics 5

  • 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 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://zajinet.ru/strik?utm_term=dodge+ram+body+parts+canada PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4393901/normal_602626a13b899.pdfIn PDF document text
    • http://zagejudivavi.sportsontheweb.net/transform_kindle_format_to.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481402/normal_604a565ec78ce.pdfIn PDF document text
    • https://rominekajamarol.weebly.com/uploads/1/3/4/0/134040464/webisekibel.pdfIn PDF document text
    • https://nuxowodevuj.weebly.com/uploads/1/3/4/6/134609076/josukevix.pdfIn PDF document text
    • http://fonepegadadujeb.iblogger.org/mmr_cdc_vis.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480728/normal_60291ad17c46d.pdfIn PDF document text
    • http://pubolovuwete.iblogger.org/16705695999.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388041/normal_6048184e34524.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408997/normal_5fca7562484bd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412394/normal_5ff185b32055f.pdfIn PDF document text
    • https://jevilorusijugif.weebly.com/uploads/1/3/0/8/130874204/kamuzudinel_mibimifuligame_gegapaporomo_tevobamume.pdfIn PDF document text
    • https://kapizufon.weebly.com/uploads/1/3/4/4/134486886/4b2ef650.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jaxejibowanub.rf.gd/53102181653.pdfIn PDF document text
    • http://tisenunab.rf.gd/bg_phonetic_xp_free.pdfIn PDF document text
    • http://ranajugupavogoj.rf.gd/70629708700.pdfIn PDF document text
    • http://fuguzametekobo.myartsonline.com/roku_3_remote_not_responding.pdfIn PDF document text
    • http://rorevofiw.epizy.com/kabir_amritvani_lyrics.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_off0000e25b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE25B 5604 bytes
SHA-256: 16a7d7f84d171d437075aa9689d9eaf053f0d06e5c9c2cbf01378226f6dab47a
font_01_sfnt_off0000f55c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF55C 10576 bytes
SHA-256: 9dbe775c95d8644a62492bbff78943f8511d6c774a2cfd4939b835f4fb4e554f