Malicious PDF — malware analysis report

Static analysis result for SHA-256 080dabe02600879e…

MALICIOUS

PDF

79.4 KB Created: 2021-03-14 10:07:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 8acd9cbc59f137b9686ca37dbc17c91c SHA-1: 214cdb62f3f860361e33c3ca9ab71824bd5bf8b7 SHA-256: 080dabe02600879ea368b27346e8a7b9d370e94cd8b8ea61f3bc52f34a100ba9
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded links, with one specifically identified as a malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The document body, though heavily obfuscated, appears to contain keywords related to trekking, suggesting a lure to disguise the malicious links.

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
  • 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 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://crophysi.ru/123?utm_term=annapurna+trekking+map+and+complete+guide In PDF document text
    • https://cdn-cms.f-static.net/uploads/4387235/normal_601ab8e6377c1.pdfIn PDF document text
    • http://ximasoj.22web.org/49364156263.pdfIn PDF document text
    • http://mobile-media.moscow/how_to_be_a_memory_mastertz4qc.pdfIn PDF document text
    • http://gratoramaa.website/fugakekejuwalozudomapogiq5fgh.pdfIn PDF document text
    • http://lumasilove.iblogger.org/feraxudiku.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464072/normal_5fd09c172b144.pdfIn PDF document text
    • http://pefipegukanijel.22web.org/aqualine_pool_salt_manuale.pdfIn PDF document text
    • http://ing-cliente.com/gevaxugepunijebumojivifebklyru.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pirapisanuton.epizy.com/69740540150.pdfIn PDF document text
    • http://teruwizirazi.rf.gd/nyt_crossword_app_answers.pdfIn PDF document text
    • http://fidawakuxut.epizy.com/ps_vita_memory_card_adapter_how_to_use.pdfIn PDF document text
    • http://kepipejesa.epizy.com/ptcb_certification_application_guidelines_and_requirements.pdfIn PDF document text
    • http://vudagolefedofa.epizy.com/star_trek_enterprise_episodes.pdfIn PDF document text
    • https://d920bd67-dfaf-4c99-85b0-fcb8118dfb91.filesusr.com/ugd/383849_2d94951190c44e2daa292a9a93a94468.pdf?index=trueIn PDF document text
    • http://parubixus.rf.gd/guidelines_for_treating_borderline_personality_disorder.pdfIn PDF document text
    • https://9a89a7da-ede3-42eb-a537-7416be21eb2d.filesusr.com/ugd/aaaf79_bd471c3f7a7c4428ae3425190b541e20.pdf?index=trueIn PDF document text
    • http://mawigugu.rf.gd/54732228270.pdfIn PDF document text
    • http://norisufa.epizy.com/alphazero_vs_stockfish.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_off0000f6a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6A7 5268 bytes
SHA-256: 69d2eee89d52b6402fef1ae476c22b144bd270cc3986d639d7e79879f63cc441
font_01_sfnt_off00010883.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10883 11240 bytes
SHA-256: f2051e6c4c588e4b469a605c9876d1f30558eb588373d27006bc9e6121cfb1fc

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