Malicious PDF — malware analysis report

Static analysis result for SHA-256 45e72c07b4181bab…

MALICIOUS

PDF

71.9 KB Created: 2021-03-15 12:29:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 06c9748a856760ef41f8f0e13dac4041 SHA-1: 8ef9f53e65f9cbb9587e16aebe2d3eb4b62bd18c SHA-256: 45e72c07b4181babe3021b323862b6c07e654a82cba331be8595ec968e73b410
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, with at least one, 'https://jumiwimov.ru/wix?keyword=at%2526t+insurance+claim+return+policy', appearing to be part of a phishing lure. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the PDF is designed to host many links on disposable domains, further supporting a phishing or malware distribution attack pattern. No scripts were extracted, but the presence of external URIs and the link farm heuristic points towards a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jumiwimov.ru/wix?keyword=at%2526t+insurance+claim+return+policy PDF link annotation
    • http://makamar.online/lejometoxowupugiwarewiwovx5ls3.pdfIn PDF document text
    • http://wwwbcpzonasegura-viabcp.com/60874797469qneju.pdfIn PDF document text
    • http://qrettalq.online/calibre_de_cables_para_instalaciones_electricas_domiciliariasp7uco.pdfIn PDF document text
    • http://mini-cam-v2.club/vujogisubixowif2cuq4.pdfIn PDF document text
    • http://brumbum2.xyz/agrahara_claim_form_for_pensionersavyzw.pdfIn PDF document text
    • http://didavixakodix.22web.org/766766128.pdfIn PDF document text
    • http://f1l3download.site/7827111409r1scr.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/kulinisokakewi/attestation_de_vente_telephone_entre_particulier.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e556430-8ea9-4015-af26-4540e574cff4/old_school_cast_iron_skillet.pdfIn PDF document text
    • https://s3.amazonaws.com/vipinib/present_continuous_tense_worksheets_for_5th_grade.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b491a57-1480-41c1-a8a8-a31804f70ab7/replace_sloan_flushmate_cartridge.pdfIn PDF document text
    • http://bufirapopedodo.rf.gd/mixudajozegigolelifesevo.pdfIn PDF document text
    • http://fiwarirekagugen.epizy.com/37530711752.pdfIn PDF document text
    • https://s3.amazonaws.com/makixibawumebol/12544022007.pdfIn PDF document text
    • http://besowotu.epizy.com/esl_idioms_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e0b4602-8df2-4770-b33b-a564b5957c82/xumejidifigikejak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f823de5c-b13e-4ea1-8613-9eb960c8e0fc/how_much_can_you_pawn_your_title_for.pdfIn PDF document text
    • http://bodotekufuw.rf.gd/wamudopepiguvuv.pdfIn PDF document text
    • http://pufupivati.epizy.com/20823356432.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4506ddb5-4cc0-4bcc-870d-f05070baf873/24250333046.pdfIn PDF document text
    • http://wipovevoliku.epizy.com/abs_workout_bodybuilding.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_off0000dd5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD5D 4144 bytes
SHA-256: 106870a10dbfccf3057d0c7ee14d46762c3b5439f45f79260474e3082fef8399
font_01_sfnt_off0000eb7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB7F 11352 bytes
SHA-256: 0f482690fa317e6e239e5a861bade1dfe97f706417e7f0679682c91ff78c3239

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