Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f50e525bca361cb…

MALICIOUS

PDF

79.1 KB Created: 2021-02-28 18:26:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: 8eccfef06f541f47da0f6bcb2e2b13c7 SHA-1: bdc595142175593790942441a2a7f08c5ebacfa6 SHA-256: 2f50e525bca361cb7f8b57b48ed3bb3156de17096402e4473309001fb52eb664
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The document body is heavily obfuscated and contains junk data, but the presence of numerous external URLs points towards a malicious intent to redirect users to potentially harmful content.

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://dugedepap.ru/wix?keyword=the+book+with+no+pictures+pdf PDF link annotation
    • https://nekitunanozot.weebly.com/uploads/1/3/5/3/135346928/ligalanujumawewusem.pdfIn PDF document text
    • https://cdn.sqhk.co/tenalewi/jbihgQH/30453965187.pdfIn PDF document text
    • http://vodoroding.info/41052027221nvw71.pdfIn PDF document text
    • http://naliputa.mywebcommunity.org/do_not_fear_in_the_bible_365.pdfIn PDF document text
    • https://cdn.sqhk.co/nupegefozub/Pjdjjpg/3153145666.pdfIn PDF document text
    • http://zoompol.xyz/sopirixugiwubusonesivitibwmsr2.pdfIn PDF document text
    • https://cdn.sqhk.co/wisisatofife/gjheRja/48356652572.pdfIn PDF document text
    • https://cdn.sqhk.co/vefuwebilux/gf8jg2h/24563373422.pdfIn PDF document text
    • https://godobinoka.weebly.com/uploads/1/3/0/8/130815080/buwikuxaz-lozanegob.pdfIn PDF document text
    • https://namonivet.weebly.com/uploads/1/3/4/4/134493383/0d36ea.pdfIn PDF document text
    • http://ins.expert/94265432993w34ff.pdfIn PDF document text
    • https://cdn.sqhk.co/mafulavet/bwiejdc/79917554898.pdfIn PDF document text
    • http://kuzexamipapoxip.medianewsonline.com/82839529361.pdfIn PDF document text
    • https://bobiwagimozud.weebly.com/uploads/1/3/1/4/131406821/wupoloj.pdfIn PDF document text
    • http://gnatural.space/bubojetadazexatemuku3om9z.pdfIn PDF document text
    • http://tramlaweq.online/77305832950rq862.pdfIn PDF document text
    • https://cdn.sqhk.co/fopujetoros/hcYcrgf/fire_flying_pokemon.pdfIn PDF document text
    • https://cdn.sqhk.co/pobopuwubox/hjxhvQu/95185867239.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://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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC47 5128 bytes
SHA-256: 4fe7ba6732e5f577424a0995ed8bed1048772cee9bb4e4f6b0de027f6156ba60
font_01_sfnt_off0000fdb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDB6 10240 bytes
SHA-256: 33990e0ff0afe12f182b8f72cb9566f2b282e3ae7e12cee2f45b7ea8269b48f6
font_02_sfnt_off000120d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120D7 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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