Malicious PDF — malware analysis report

Static analysis result for SHA-256 367e4c542592e6a3…

MALICIOUS

PDF

70.4 KB Created: 2021-03-07 19:52:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: ceb63baea0ac74571beb29a0097bb676 SHA-1: 10b1837a20532ef364bea11bdf17f75c20c9926e SHA-256: 367e4c542592e6a36d3ed1a33f0d10f322097cd4924b938dc439baca6e917e4c
244 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a large number of embedded links, many pointing to disposable domains and redirectors, indicating a link farm or phishing attempt. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution via these links. No scripts were extracted, but the PDF structure itself is indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.
  • 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://yafferge.ru/wix?keyword=stone+poneys+different+drum+chords In PDF document text
    • https://cdn.sqhk.co/fomezawelud/g2YgiwI/toon_blast_lives_cheat_iphone.pdfIn PDF document text
    • https://cdn.sqhk.co/lerapuraroke/d7jEhfe/rocket_car_ball_for_pc.pdfIn PDF document text
    • http://bebetadiruj.mywebcommunity.org/maze_runner_death_cure_book.pdfIn PDF document text
    • https://cdn.sqhk.co/rirexiwudag/hf0fjie/6267845139.pdfIn PDF document text
    • http://helplnstagramcontact6088756.com/tozokubiwobewivuvadudiduvrj.pdfIn PDF document text
    • http://wirobigi.medianewsonline.com/what_is_trust_law_income.pdfIn PDF document text
    • https://cdn.sqhk.co/jikowuzu/rhhjh8U/john_travolta_bubble_boy_gif.pdfIn PDF document text
    • http://9gusevshop.website/bookmark_file_onlineuu2sf.pdfIn PDF document text
    • https://cdn.sqhk.co/lepudijazur/4tTkic8/carpet_cleaning_machine_bissell.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://d321836a-1bf8-47c4-b4d3-67fe1e7f0250.filesusr.com/ugd/33ab24_53fb21a1cf0d49538e0ddc4c16bccd02.pdf?index=trueIn PDF document text
    • http://miganuvag.myartsonline.com/disezufajegezonanojo.pdfIn PDF document text
    • https://68fdcf0a-b1f0-4758-9edf-48d2be6d990b.filesusr.com/ugd/ac51ce_5472a53322a443438e1143d8f33bd670.pdf?index=trueIn PDF document text
    • https://73f4d879-981c-49fe-abc7-520f36a14a84.filesusr.com/ugd/b77b08_69f5f38c4e88482fbfbd2d6855071615.pdf?index=trueIn PDF document text
    • http://tapoloferazuziw.atwebpages.com/86328161950.pdfIn PDF document text
    • https://41be308f-8a64-4dec-8b30-4937605be974.filesusr.com/ugd/f042fe_1b5653a058414561b27b7335fea07c55.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fowikorejodi/45985095264.pdfIn PDF document text
    • https://s3.amazonaws.com/besafefaf/brother_printer_dcp-_t710w_driver.pdfIn PDF document text
    • https://9c50f6df-e9c1-453e-a208-eff1cefe231f.filesusr.com/ugd/44b3dc_f20e60edad7d426daafd0670062e30c4.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_off0000d328.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD328 5356 bytes
SHA-256: cb02d7083df3575b87c8c43d21db76b54c2366b5795170e7259e63d50b9c551c
font_01_sfnt_off0000e544.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE544 10984 bytes
SHA-256: b3faf55d109104a4588ae305b6155984fe1474f152d3779259b0835ce6d711a9