Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6615a5acce09628…

MALICIOUS

PDF

83.1 KB Created: 2021-03-02 05:54:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 281b6f3b20a415fc9bd1d101533abe73 SHA-1: c9b7a0709acd86bcd1684c849c23b3c30b435da2 SHA-256: d6615a5acce096282f4c61b406bf3bc4faf596b1300a076d99928044f7e23e64
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable hosting services, indicating a phishing or link-farming attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to malicious sites. While no scripts were explicitly extracted, the PDF structure and embedded links are consistent with techniques used to deliver phishing lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://pelibifir.ru/strik?utm_term=can+you+plant+trees+in+cindersap+forest PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4486521/normal_5fd83fa51893d.pdfIn PDF document text
    • https://cdn.sqhk.co/ruxuvedije/gjiigNM/nurefulukamonirepuw.pdfIn PDF document text
    • http://xejopegig.mypressonline.com/natewiza.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496602/normal_601fd2b4dbbc8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417315/normal_602706c4896ef.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470960/normal_5fcfa32391998.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462037/normal_5fe1c4548e675.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403413/normal_5fecf3d4d401f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368479/normal_5ff279bf812ae.pdfIn PDF document text
    • http://tezoxefakalexo.sportsontheweb.net/39072910407.pdfIn PDF document text
    • http://zabolojisag.getenjoyment.net/vocabulary_workshop_level_f_unit_5_synonyms.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422876/normal_5fd9346bbcb44.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://pozujig.epizy.com/86270089009.pdfIn PDF document text
    • http://zevusup.atwebpages.com/types_of_organizational_structure_in_management_science.pdfIn PDF document text
    • http://lasuwutiganije.rf.gd/descargar_msica_mp3_gratis_para_celular.pdfIn PDF document text
    • http://gutekuretejapoj.onlinewebshop.net/vesoguvakivu.pdfIn PDF document text
    • http://ginowane.onlinewebshop.net/rt-n66u_openvpn_server_setup.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fa5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA5C 5156 bytes
SHA-256: a2fb7f4d4b42fa63dddcaaccd406267d3a54940f925e5eeee0fdfd49164e1b23
font_01_sfnt_off00010bff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BFF 10856 bytes
SHA-256: 8ec22a866a0db409ccf83b34b12947d1b361ca944415cbcaa84fc865c64d80b4
font_02_sfnt_off000130cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130CC 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

Open this report in the interactive analyzer, or submit your own file for analysis.