Malicious PDF — malware analysis report

Static analysis result for SHA-256 9071e3fcfefee324…

MALICIOUS

PDF

73.3 KB Created: 2021-03-05 22:49:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 0014db678a9c34335bc5810676d155db SHA-1: ed47d694e7d3e52422946df3743fe926593e426c SHA-256: 9071e3fcfefee3241cffa5fa9632c180859d46a8619a3383b6dd9a16dc87e844
126 Risk Score

Malware Insights

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

The file is a PDF that contains numerous embedded URLs, many of which point to suspicious domains. Heuristics indicate it functions as a link farm on disposable hosting, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or distributing further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://gimoguvi.ru/wix?keyword=long+term+effects+of+carbon+monoxide+on+the+body PDF link annotation
    • http://tipofeliluget.medianewsonline.com/how_to_have_multiple_streams_on_twitch.pdfIn PDF document text
    • http://itclick.info/form_1120x_nol_carryback61msb.pdfIn PDF document text
    • http://pobesegu.scienceontheweb.net/kinobody_aggressive_fat_loss_diet_plan.pdfIn PDF document text
    • http://doucheop.xyz/log_benches_animal_crossing40r0i.pdfIn PDF document text
    • http://gadivawiw.sportsontheweb.net/zefes.pdfIn PDF document text
    • http://fortuneo-enligne.com/recipe_for_disaster_skyrimk3ls4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409413/normal_601362601c302.pdfIn PDF document text
    • http://instofficial.online/reflux_treatment_guidelinesfutnl.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455883/normal_602e99c132f0a.pdfIn PDF document text
    • http://sidufapas.mywebcommunity.org/can_i_rent_an_apartment_without_a_lease.pdfIn PDF document text
    • http://idealica-italiaoficial.site/nuxofopenow1yh5.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/sesijesule/bts_guidelines_bronchiectasis_2019.pdfIn PDF document text
    • https://c9b0c9dc-51ad-46ec-84b2-dbc26df53712.filesusr.com/ugd/b6f588_a4dc05405a3d4e0c906d60f5fc7543e8.pdf?index=trueIn PDF document text
    • https://e8f98835-b194-42a5-b43f-fe2f29920dd6.filesusr.com/ugd/bf650e_de4f31725fac4ddea636ea86d81842b7.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/879b1ceb-5290-4b91-b911-3dbc2b9a50d5/38556695498.pdfIn PDF document text
    • https://s3.amazonaws.com/luxaduzimase/96049814058.pdfIn PDF document text
    • https://s3.amazonaws.com/sigobija/american_horror_story_hotel_soundtrack.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28557747-4923-4148-9a0e-80ecd39e99e3/sadazidebuka.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f26922c-371c-4c0d-8259-f8f45869117a/what_is_a_digital_transformation_roadmap.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_off0000e121.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE121 5656 bytes
SHA-256: 352051d1a02b5adb9700ec86379bc0cd64c947a3ac1be75d89e76f6409ba098e
font_01_sfnt_off0000f449.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF449 10352 bytes
SHA-256: 19a73f99f7ca895efd545d7e1f4002e728692f2297bfaca5cafeda37e38a689e

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