Malicious PDF — malware analysis report

Static analysis result for SHA-256 71b18900220c34a0…

MALICIOUS

PDF

88.5 KB Created: 2021-03-06 10:46:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: bef36769ec874492646c15dc8602b0f5 SHA-1: 2c64e1d79ee8ccc3db805a90c2be9266011d8a63 SHA-256: 71b18900220c34a055f79ae989d5638deebf2e44d0eb6e2fe2f168de1ecc869c
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file masquerades as a user manual for a Whirlpool microwave to trick the user into clicking a malicious link. The embedded link, https://mezovuduw.ru/award?keyword=whirlpool+microwave+wmh31017as-1+manual, is hosted on a disposable domain and is flagged as suspicious. ML and ClamAV classifiers strongly indicate maliciousness, likely related to phishing or malware distribution.

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://mezovuduw.ru/award?keyword=whirlpool+microwave+wmh31017as-1+manual PDF link annotation
    • https://cdn.sqhk.co/gizoxemovefi/mogibig/xukamavamiw.pdfIn PDF document text
    • http://erogan-columbia.site/609495444482em19.pdfIn PDF document text
    • https://cdn.sqhk.co/kigaratak/TRhiBt3/free_business_plan_template_for_trucking_company.pdfIn PDF document text
    • http://lazerepil.site/200612614644eg7h.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367903/normal_6012427ac3ec6.pdfIn PDF document text
    • http://wrestling-mma.com/73397976792b195z.pdfIn PDF document text
    • http://jolilibigir.22web.org/herpes_zoster_guideline_2019.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4504922/normal_5fef7043574c7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414336/normal_600009dfac437.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478127/normal_600b66a9dcf32.pdfIn PDF document text
    • http://miiliioner.xyz/falotepimipa50s5q.pdfIn PDF document text
    • http://laitlabs.pro/34994780222vlgyj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://7095e710-59ac-4d27-8a5a-f3bbcaf65deb.filesusr.com/ugd/418e76_60ada84783564a7da45bfdefbe4bc631.pdf?index=trueIn PDF document text
    • https://bf6af823-cb0d-4ee8-9d5b-4f0b1de5ed24.filesusr.com/ugd/9eb187_b1677ef310494e3cb5c5489c33e7c4af.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wajufifenoxuj/arabian_nights_aladdin_flute_sheet_music.pdfIn PDF document text
    • http://zirexig.epizy.com/bsf_constable_application_form_2019.pdfIn PDF document text
    • https://945b3f91-9c76-4178-be32-f0dab3cfe2c6.filesusr.com/ugd/8d5d69_770e1dba0b3344e98e8e63105478b1fd.pdf?index=trueIn PDF document text
    • https://04a80c79-134c-446e-801b-0c1635678e59.filesusr.com/ugd/5cebf8_4ebfebb56f264e6c903017e048c27119.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wozowuledij/zosyn_oral_form.pdfIn PDF document text
    • http://vunaduwijumuz.epizy.com/viwepisesijez.pdfIn PDF document text
    • https://s3.amazonaws.com/baxadelefofibuz/53368871186.pdfIn PDF document text
    • https://181f3bdf-810f-4c34-abb3-9f3362228cd6.filesusr.com/ugd/30415f_189cc2a05a184969a3eacd2b610ba0ff.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_off00011a95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A95 5808 bytes
SHA-256: c65cca150ac39a3a9476d8ab0a3c1e342a09f22d4d411232c6c31e48117bbf46
font_01_sfnt_off00012e5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E5D 11492 bytes
SHA-256: fc0aacfe77c589e15505af1c14e0b34b0a635889118f31fb88dcd65041fab1e2

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