Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e4b0f2b1fdaf0a8…

MALICIOUS

PDF

68.1 KB Created: 2021-02-28 04:48:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 26323176d884700976e1108118634c0b SHA-1: 80574a0eea70635c2b6abff429168baa1aba462d SHA-256: 7e4b0f2b1fdaf0a88cfb0c497d12cc715cfca78f042c378259f1a0ab300f2f37
126 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, with several pointing to suspicious domains, suggesting a phishing or malware distribution scheme. The 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic further supports this by indicating the PDF is used to host many links on disposable domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9688

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
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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://lozipotod.ru/award?keyword=how+to+make+iced+coffee+in+my+keurig+elite PDF link annotation
    • http://iqecoportal.ru/assets_android_webview3cik3.pdfIn PDF document text
    • http://dreabling.online/95599755262cs4bw.pdfIn PDF document text
    • http://usesalle.xyz/3779274234i4xm.pdfIn PDF document text
    • http://trylait.pro/65336691752d2586.pdfIn PDF document text
    • http://lidzadva.xyz/king_kong_mod_minecraft_1._12._2tjfej.pdfIn PDF document text
    • https://cdn.sqhk.co/mofijovelu/fK9hhhc/comic_book_animated_movies.pdfIn PDF document text
    • http://haifaiv.ru/218930311101dh8p.pdfIn PDF document text
    • http://wordwild-store.com/navy_eval_writer49gek.pdfIn PDF document text
    • http://bilkaita.space/pifuxejivazozowudizk48a1.pdfIn PDF document text
    • http://betflixguvenilirmi.com/free_streaming_sites_for_footballp5h4e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vobununebufipu.rf.gd/pobovuxaribasutolaz.pdfIn PDF document text
    • https://s3.amazonaws.com/pusolefosex/xibadamukanezuda.pdfIn PDF document text
    • https://s3.amazonaws.com/bezorito/how_to_setup_a_fishing_line_for_bass.pdfIn PDF document text
    • http://kivozusemu.atwebpages.com/legal_definition_of_appurtenances.pdfIn PDF document text
    • http://gaxilitexu.onlinewebshop.net/qumi_hd_pocket_projector_q5-wt.pdfIn PDF document text
    • http://deroxemonak.epizy.com/converting_units_worksheet_49_math_092_answers.pdfIn 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_off0000daa1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAA1 5380 bytes
SHA-256: 5ef0ab4b109cf663b75e20756e6249d22c588960f0b4d9ff828381a9bf21618d
font_01_sfnt_off0000ecf4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECF4 10292 bytes
SHA-256: 4e13df2cafce143ae33e0eb804306275eeb5230367c08e5ef28a50069706b32f

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