Malicious PDF — malware analysis report

Static analysis result for SHA-256 df5c2a891d4b7e7f…

MALICIOUS

PDF

78.6 KB Created: 2021-03-16 18:50:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 2de4db43a1abc1645b503a182000c8bf SHA-1: fa28a626837b65fb04384604a4aacecb66206518 SHA-256: df5c2a891d4b7e7f84db49919d8807ab6264ac0639113340ba80d9fdd1fce322
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 domains, and is flagged as a link farm. ClamAV detection and ML classification strongly indicate malicious intent, likely for phishing or malware distribution. The presence of external URIs suggests an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://seumenha.ru/strik?utm_term=how+to+adjust+ski+bindings+tyrolia PDF link annotation
    • http://italywow.info/python_list_comprehension_create_two_listsklo6e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472206/normal_60340ae96f987.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461763/normal_5ffbdaddd39a2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495393/normal_5fda5ff5e5575.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414331/normal_5ff3ce57b9042.pdfIn PDF document text
    • https://cdn.sqhk.co/dasewugiru/gdphgig/smith_s_food_and_drug_henderson_hours.pdfIn PDF document text
    • https://cdn.sqhk.co/zepipawetopi/d7oPgrB/petifexufubefijegofevaju.pdfIn PDF document text
    • http://uscreditreport.info/milulotpi6fk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385859/normal_5ffe8d9385085.pdfIn PDF document text
    • http://educationonline.website/how_long_for_gums_to_heal_after_crown7tee6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367289/normal_6032b81177eed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496584/normal_6028ee4647b4a.pdfIn PDF document text
    • http://ses-sanobrabotka.ru/frank_zane_booksge6bv.pdfIn PDF document text
    • https://cdn.sqhk.co/xidatelo/jiwqhbd/wuduvejawurerixowuxugu.pdfIn PDF document text
    • https://cdn.sqhk.co/towevefizub/cOaFJ6d/how_to_write_a_good_business_proposal.pdfIn PDF document text
    • https://cdn.sqhk.co/gidenateg/rTjcQGk/72097081687.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/kimone/love_island_t_shirts_missguided.pdfIn PDF document text
    • https://01c4c9a3-ee74-4db9-a65d-799443b8dbf1.filesusr.com/ugd/a64c8c_e445066ed22b4888bd6a5320cffa1c4f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fikuvine/girafavuditof.pdfIn PDF document text
    • https://cb6d8354-940b-4e05-9f1d-0150973ab277.filesusr.com/ugd/882da0_ebdc54338f174821a92dc372a05f9edd.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lorugipopuxe/5501376100.pdfIn PDF document text
    • https://b81e1767-bb0d-4562-9f98-cfef66859bb1.filesusr.com/ugd/b48b60_5454c02653564a72b53da09d5ad8b5d7.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f737.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF737 5428 bytes
SHA-256: 37c583fc444304c4a8d41c1dbbf316ddcd01af350fee170c1152c40aa4022066
font_01_sfnt_off000109cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109CF 10336 bytes
SHA-256: d5b5cc09f09c398f06a579652936c569b6ed25dd81d4495e066ff63f4c440575

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