Malicious PDF — malware analysis report

Static analysis result for SHA-256 8745166dc4426f00…

MALICIOUS

PDF

89.1 KB Created: 2021-03-04 03:17:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 9207adfd7877aebfbb6e179f9860d1c6 SHA-1: f5991e6ae026fb30f74878098e0398cf81eb4a3f SHA-256: 8745166dc4426f00fbf75f78e1fe3781385d56e57ee7915c4b841067f5eb3f33
126 Risk Score

Malware Insights

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

The PDF document was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the document is designed to host numerous links on disposable domains, likely for phishing or malware distribution. The embedded URL 'https://fokemale.ru/award?keyword=the+heavenly+man' is a primary indicator of a malicious destination.

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://fokemale.ru/award?keyword=the+heavenly+man PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369486/normal_60132818169c4.pdfIn PDF document text
    • https://wusedutewaxugag.weebly.com/uploads/1/3/1/4/131437839/rakabutedisi_lutesawu_lipeka_wejizameguvoz.pdfIn PDF document text
    • https://cdn.sqhk.co/vibebexez/sbjdKQS/auto_reply_email_outlook_2007.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4394066/normal_5fd6a6a6aab72.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490244/normal_5fe4fb2da63d2.pdfIn PDF document text
    • http://nufefabipiketod.22web.org/73218725244.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408584/normal_60291b23df486.pdfIn PDF document text
    • https://cdn.sqhk.co/toledexipez/UyRgcha/sigezigivugewowujekug.pdfIn PDF document text
    • http://jizefuli.22web.org/organic_flannel_sheets_canada.pdfIn PDF document text
    • https://cdn.sqhk.co/revikokelobu/CGjcvwL/run_race_3d_2020.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fepezafo.rf.gd/tv_choice_guide_uk.pdfIn PDF document text
    • http://deketinak.rf.gd/how_to_defend_in_street_fighter_4_champion_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/zagubip/installment_payment_agreement_letter_template.pdfIn PDF document text
    • https://s3.amazonaws.com/tufitijinexu/tubiben.pdfIn PDF document text
    • http://naxilolebepup.epizy.com/89400651811.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_off00011814.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11814 3448 bytes
SHA-256: 0042d67de20626e5cdc8bc6e4210039fcf54751b4cfdc93e213c2eaf06f547a2
font_01_sfnt_off00012487.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12487 4764 bytes
SHA-256: abe815141d1cd4ca076cdb0fd1a892c7102614f7bd4b19e55a3789207b2c832d
font_02_sfnt_off0001349d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1349D 10208 bytes
SHA-256: ba2a18961a820812e2c1f654bf42b2b619d590e12c0e6386ba82d9491a6db4d6

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