Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f07493d844a2aff…

MALICIOUS

PDF

73.5 KB Created: 2021-04-03 19:26:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: e378475ed75f30a3d335988019301eff SHA-1: c0b759e5c131f040542df01e685e1c823f87da96 SHA-256: 2f07493d844a2affcec7820cff7f8ff12d4b464b8c1cb3789a57c7752bd28f39
186 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many pointing to disposable domains, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing or malware distribution vector, likely initiated via spearphishing.

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
  • 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.
  • 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://botokaw.ru/strik?utm_term=dodge+ram+repair+shop PDF link annotation
    • http://prizinsta24.space/5-3_word_problem_practice_polynomial_functionsi5x4r.pdfIn PDF document text
    • https://cdn.sqhk.co/zirigajer/jprghfd/33354347770.pdfIn PDF document text
    • https://dudidupu.weebly.com/uploads/1/3/1/3/131380390/5d83827b3fd421.pdfIn PDF document text
    • http://idealica-it.website/how_to_describe_a_sad_rainy_daypxokt.pdfIn PDF document text
    • https://cdn.sqhk.co/temetixufuxi/hg1idG8/personal_swot_analysis_test.pdfIn PDF document text
    • https://cdn.sqhk.co/xujanezujol/ibgfmc9/78519021434.pdfIn PDF document text
    • https://zibozofos.weebly.com/uploads/1/3/4/8/134896422/2a2b8121d046303.pdfIn PDF document text
    • https://lugapageragije.weebly.com/uploads/1/3/4/6/134617753/gazusowanovun.pdfIn PDF document text
    • https://zovarufegurer.weebly.com/uploads/1/3/4/6/134625168/8626255.pdfIn PDF document text
    • https://nuxelimifa.weebly.com/uploads/1/3/0/7/130776070/16c134acc500b.pdfIn PDF document text
    • https://cdn.sqhk.co/xororasomig/jdHhjia/misipep.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://73af689e-4c80-4f62-99d3-7a886641ad81.filesusr.com/ugd/3b5dd9_85f0d42fb9cd4a9a8d159f1790a253aa.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gavexilatuvitaz/43820195099.pdfIn PDF document text
    • https://s3.amazonaws.com/bajuse/17592331177.pdfIn PDF document text
    • https://s3.amazonaws.com/tazibabebamep/feral_druid_essence_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/xixonu/3d_mmo_villagers_and_heroes_apk_obb.pdfIn PDF document text
    • https://cb2d4818-2134-4ea5-ae57-1bc45cfc4292.filesusr.com/ugd/7e787c_dbc186d4afcc41888c53e3b3a281d573.pdf?index=trueIn PDF document text
    • https://8dfdba76-182f-4dc4-9dda-37a8c8d09dc9.filesusr.com/ugd/4ae4db_9c91da44ffb44427b924cbae3ce0c862.pdf?index=trueIn PDF document text
    • https://f8071fb1-33dc-4bb9-9fe9-292e0ca0d861.filesusr.com/ugd/253000_e22bbf44554f40f0abb16b7f90f7541e.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_off0000e25b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE25B 5340 bytes
SHA-256: 92d068932a10fb16929ef58a9bdd1d19089614c302edfd7f98707a74a96abd42
font_01_sfnt_off0000f45e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF45E 10856 bytes
SHA-256: b910dd263b2bb5e9193e44982771049507a3a21b7a841aae621e77442004b761

Open this report in the interactive analyzer, or submit your own file for analysis.