Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe89650de705b154…

MALICIOUS

PDF

101.2 KB Created: 2021-04-06 19:40:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 6078613dad3d83af9256c7daed9a16e3 SHA-1: c29c54a4dba1ed5b44c3b8f8b6011dc54b245122 SHA-256: fe89650de705b1546c40789c0752a27b840453b7943dc82809b1ee0ea9a04b57
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable domains and link farms, a common tactic for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious content, likely as part of a spearphishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jumiwimov.ru/strik?utm_term=schwinn+airdyne+models+history PDF link annotation
    • http://biweekamnf.com/saxanarumedrwzjo.pdfIn PDF document text
    • https://jedifubebevaze.weebly.com/uploads/1/3/4/8/134873515/laxapo_mubejoxigetomov.pdfIn PDF document text
    • https://zuwumepegowivos.weebly.com/uploads/1/3/1/0/131069935/nonigowuparod.pdfIn PDF document text
    • http://vulifux.66ghz.com/regefofimunubumejemeriduf.pdfIn PDF document text
    • https://virigegeke.weebly.com/uploads/1/3/2/7/132740897/rososatumalaxe.pdfIn PDF document text
    • http://lenuboza.iblogger.org/89443788613.pdfIn PDF document text
    • http://nelawetazabuta.66ghz.com/zovufanexidujiparetu.pdfIn PDF document text
    • https://wisapemewe.weebly.com/uploads/1/3/4/7/134713478/bemokenir-bulirob-wegalusedo-nutuwukimunigis.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464301/normal_600b01df49dfe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4493873/normal_600084c39c4e7.pdfIn PDF document text
    • http://blankid.ru/9194469459654bm9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409114/normal_5fc59479b73a4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448103/normal_604f4feb9bfec.pdfIn PDF document text
    • http://drive4mclaneeffingham.com/do_you_cook_brisket_fat_side_up_or_down_in_slow_cooker5tjdp.pdfIn PDF document text
    • http://toppiksnack.xyz/683335108294mt4c.pdfIn PDF document text
    • https://rasisepuwefu.weebly.com/uploads/1/3/4/6/134678142/3465843.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501632/normal_60223c9007fed.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/a89982d0-c49d-443e-af1d-a64343f77b45/what_does_god_say_to_cain.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e39e9cd6-50ab-4d36-a592-15ba20b5c7e7/gibezagezikujopagidudi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/98f84cae-4da0-41d3-ae31-996522aeb3b8/73578037857.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0249d605-f74f-4ed7-87aa-b06cda5c14dd/harman_accentra-2_pellet_stove_parts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c54257a3-fef9-4e20-9b03-b4a49e52a989/let_the_right_one_in_book_eli_castration.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_off00014bee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14BEE 5476 bytes
SHA-256: b52a9911a5db77f3dbb9b49263fc5adbf73f8364d0b62ce3d9df46309c186299
font_01_sfnt_off00015e7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15E7B 11652 bytes
SHA-256: bd9660d0d053917608c9ed3cb7be1032eefa5288480bfd3ca41421e9615c5b47