Malicious PDF — malware analysis report

Static analysis result for SHA-256 6474b4d4c7e70269…

MALICIOUS

PDF

83.6 KB Created: 2021-02-22 20:22:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: f66cc0289d7ca89c0b8d6e42f7b2270e SHA-1: d2e302221fc1d403fad7de4e409ef07cfe1cad1f SHA-256: 6474b4d4c7e702690c3b8cc737ce761b33a6ec573bedb0caf2b3f5d3c0e31f5c
134 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one specifically identified as a potential phishing lure related to a book summary. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The presence of external URIs and a link farm heuristic further supports the malicious nature of the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://jottigo.ru/strik?utm_term=ronald+wright+a+short+history+of+progress+summary PDF link annotation
    • http://antinomi.design/symbol_barcode_scanner_usb_driverykr17.pdfIn PDF document text
    • http://meine-gebuhrenfrei.com/chord_chemistry_downloadlfbf5.pdfIn PDF document text
    • http://interbank.link/tejazexafw0lll.pdfIn PDF document text
    • https://rakevuxex.weebly.com/uploads/1/3/4/0/134040666/651be03e5c.pdfIn PDF document text
    • http://my-favshopg.online/how_to_pair_a_universal_rca_remotec7txg.pdfIn PDF document text
    • http://getsol.xyz/soxisaresufofila9fkjp.pdfIn PDF document text
    • https://cdn.sqhk.co/detaludolef/geejhgf/79401288807.pdfIn PDF document text
    • https://cdn.sqhk.co/fapolokid/Lpja4gi/amazing_facts_about_earth_s_atmosphere.pdfIn PDF document text
    • https://cdn.sqhk.co/jitegoji/HjhmjeJ/30123313407.pdfIn PDF document text
    • http://hiziryigit.online/bo4_zombies_classified_guidewj1t1.pdfIn PDF document text
    • https://kujegafibez.weebly.com/uploads/1/3/4/2/134265926/rinuxovufepamuwex.pdfIn PDF document text
    • http://visionnew.xyz/tinkercad_keyboard_shortcutsqocxb.pdfIn PDF document text
    • http://outputqwvk.space/sotobiviz2sml.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jifaradazuzigo.rf.gd/what_is_phenytoin_hypersensitivity_syndrome.pdfIn PDF document text
    • http://serivisaruwe.epizy.com/taman_nasional_alas_purwo.pdfIn PDF document text
    • http://fezivepe.rf.gd/fimefafewixese.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_off000107f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107F4 5656 bytes
SHA-256: ac09249bb9cd45ba81392a7c18580e892e2739f4494336e9e78557cfcf9d3f52
font_01_sfnt_off00011b2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B2A 11544 bytes
SHA-256: 38d3bd49e7de02dc088292b5eff8e2d3c339460ac8f39a2fa95c788ccf652368

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