Malicious PDF — malware analysis report

Static analysis result for SHA-256 60b00f65e0eec175…

MALICIOUS

PDF

71.1 KB Created: 2021-02-28 18:47:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 0a3ee361313dccde3242d391539ef963 SHA-1: 90d8c4b08e384a7fb7fbcdd4f307102c0576ce1f SHA-256: 60b00f65e0eec17563d071f73d898dd9d17773147a0d454d0fceca464073f278
146 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a phishing or trojan threat. The 'SE_CALLBACK_LURE' heuristic suggests the document's content is designed to trick the user into making a phone call, likely for a scam. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a phishing attempt, potentially leveraging embedded JavaScript for malicious actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://maypoin.ru/123?utm_term=why+do+i+have+blood+on+my+eyeball PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4427104/normal_601c7f058ab13.pdfIn PDF document text
    • http://lozejebivo.scienceontheweb.net/delonghi_toaster_review_nz.pdfIn PDF document text
    • http://nigavereke.mygamesonline.org/calculate_wheel_horsepower.pdfIn PDF document text
    • http://tusiteguluvora.getenjoyment.net/how_to_become_an_electrical_engineer_in_canada.pdfIn PDF document text
    • https://cdn.sqhk.co/bilanogakiw/Jjbqlie/kazazesuf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478438/normal_601ad2f59e9af.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496381/normal_5ff3d0cd0fa19.pdfIn PDF document text
    • http://lumobumekola.getenjoyment.net/should_internet_be_capitalized.pdfIn PDF document text
    • https://cdn.sqhk.co/tavikagisato/dhGYii7/63876605244.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427820/normal_6035bf07cb870.pdfIn PDF document text
    • https://cdn.sqhk.co/jopubelo/Gheydgf/rebuilding_credit_after_bankruptcy.pdfIn PDF document text
    • https://cdn.sqhk.co/rubutemoxe/hjdF7Hi/callaway_mavrik_irons_review_youtube.pdfIn PDF document text
    • http://goloturasituj.66ghz.com/16822004695.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fulawumobolofog.epizy.com/gemujajowixu.pdfIn PDF document text
    • http://nukilaba.myartsonline.com/pefofej.pdfIn PDF document text
    • http://pidosowot.epizy.com/total_coliform_bacteria_definition.pdfIn PDF document text
    • http://dogufisojorosef.epizy.com/dajefa.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_off0000da65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA65 5108 bytes
SHA-256: 7c90dcb6178d446e990b8b8a576430de418de38fdcdaecd601057ff1a21a82db
font_01_sfnt_off0000ebb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBB8 10456 bytes
SHA-256: 71cc1e4f9f89b8442b77936b5591ce27f311de5e4e44148a3188c6cdfe317de6

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