Malicious PDF — malware analysis report

Static analysis result for SHA-256 622acfb7406493aa…

MALICIOUS

PDF

88.7 KB Created: 2021-03-24 17:11:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 53dd28b3f6db78a03b23649d58cc5569 SHA-1: 79edca0ead5ab19e6b4d14a2d6f964b2fb659e83 SHA-256: 622acfb7406493aab159405ffaa8c109fd5a80bded18e0271e6c9956cb269afb
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links, many pointing to disposable domains and exhibiting link farm characteristics, indicating a phishing or redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://botokaw.ru/strik?utm_term=rime+of+the+ancient+mariner+summary+line+by+line PDF link annotation
    • http://lnstagramverifiedbadgeservice.com/19059502175d6opz.pdfIn PDF document text
    • https://nafizanoride.weebly.com/uploads/1/3/4/5/134596231/begepinir-jejub.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406202/normal_6020d5f659b55.pdfIn PDF document text
    • https://cdn.sqhk.co/zokasejiz/hcjegep/72663938828.pdfIn PDF document text
    • https://cdn.sqhk.co/guwuweri/ifhfQhh/xolizipar.pdfIn PDF document text
    • http://opendouche.xyz/37888327818xoydt.pdfIn PDF document text
    • https://fexegidonowagi.weebly.com/uploads/1/3/5/3/135325594/8cd5c2ddbec73b.pdfIn PDF document text
    • http://damita.fun/85191743911q9b47.pdfIn PDF document text
    • https://cdn.sqhk.co/vilomikov/pxhJggh/treasure_hunters_james_patterson_series_order.pdfIn PDF document text
    • http://blablablacar.online/824701247459eg57.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500670/normal_6041b9f6f23e4.pdfIn PDF document text
    • https://cdn.sqhk.co/sewuvavimebi/igGha5J/81044839821.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459175/normal_6025891cda449.pdfIn PDF document text
    • https://cdn.sqhk.co/pufowuvikij/ggLjdd7/the_third_day_explained_episode_3.pdfIn PDF document text
    • http://roflan.site/writing_algebraic_expressions_from_word_problems_worksheets_6th_gradendr5w.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/gavobawum/how_do_i_upgrade_my_verizon_router.pdfIn PDF document text
    • https://cdd249b8-77b1-4a94-b024-8995efe4d959.filesusr.com/ugd/d394ff_f6bcff80c5d9465695878508183bca5d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zumezeviwakiz/20776650271.pdfIn PDF document text
    • https://5634f520-c25d-421d-ab67-3d94505d13cb.filesusr.com/ugd/1b85ab_780a9ff9ef344176b93256794b332b7d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gorajikunobixi/81298235373.pdfIn PDF document text
    • https://caa91486-5fcc-43b7-8b2b-5b817ae85bbe.filesusr.com/ugd/26bbcf_c57eb25deb7b4c71b46a2dad37b3d51c.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_off00011d53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D53 5372 bytes
SHA-256: 7fb38369ccd4ddd28bd84fa1bd9b48ceacab7f304eeb12817a44efa8a1c9c418
font_01_sfnt_off00012f79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F79 11280 bytes
SHA-256: d46e6124154424b1e1f3011382586a3532be1488583186571d7915e117aa5308

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