Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d0b0f01a50a9444…

MALICIOUS

PDF

75.4 KB Created: 2021-03-02 00:48:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 2111cf31996c1d5a957b1ec256c5068c SHA-1: 469566c6480be8bf2259aa3e185719ac7f3a2fcf SHA-256: 2d0b0f01a50a94440bdbb1861dc683a4a669345071108a8a02c2de7a2efa9d8f
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous external URIs, with one prominent URL pointing to a suspicious domain ('fokemale.ru') that is likely used for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://fokemale.ru/strik?utm_term=what+are+the+cardiac+drugs PDF link annotation
    • http://pasanubilop.iblogger.org/considering_matthew_shepard_sheet_music.pdfIn PDF document text
    • https://cdn.sqhk.co/rewufarelaze/gh5hagj/car_operating_cost_calculator_canada.pdfIn PDF document text
    • https://cdn.sqhk.co/rowazazapa/chbij8f/zed_build_tft_fates.pdfIn PDF document text
    • http://onlinetiser.website/the_meaning_of_political_economy_in_relation_to_developmentrh5yb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500877/normal_600e26a57c1e7.pdfIn PDF document text
    • http://idealica-itufficiale.website/xaveva35rp.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4498978/normal_6003c7a0ade27.pdfIn PDF document text
    • http://tryadasert.online/vaxejifisc2rw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381090/normal_602592d22d65f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367000/normal_5feeb1a82ac84.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fonaxipovun.epizy.com/alif_se_mr_x_song_hd.pdfIn PDF document text
    • http://bamemuwibe.epizy.com/93830960190.pdfIn PDF document text
    • http://bezopebadutaz.rf.gd/taxuwenenab.pdfIn PDF document text
    • http://nevefilin.rf.gd/bojunepuxikalujexabelizi.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_off0000ebb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBB3 5180 bytes
SHA-256: 3cd9b7918ab51f5a326e8ef6936acb51d8c03284080cdc33d3e4a9e6b8f9e3a9
font_01_sfnt_off0000fd5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD5A 10436 bytes
SHA-256: 4239c07a5de6879b54c909a554ea1d7d3318dd184b2115dc50a338b8cd4646b3

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