Malicious PDF — malware analysis report

Static analysis result for SHA-256 6dac465f01cefd96…

MALICIOUS

PDF

95.5 KB Created: 2021-03-28 00:43:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 98f68904301db679e1b3cc7c2b4c966d SHA-1: a23a33e369646d617be3e79d642bce0f76c6178e SHA-256: 6dac465f01cefd96f98c3e2a75871e0be3a32cab7606a28207ca2880a38ea8d8
134 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, specifically as a phishing or trojan. It contains numerous embedded URLs, with one pointing to 'nipisod.ru', suggesting a phishing or malware distribution attempt. The 'SE_INVOICE_LURE' heuristic further supports the idea that the document is designed to trick the user into interacting with its content.

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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://nipisod.ru/award?keyword=collapse+of+the+soviet+union+pdf PDF link annotation
    • http://vopugixeroramox.medianewsonline.com/taruxivuvak.pdfIn PDF document text
    • http://wixosefimaba.scienceontheweb.net/bsnl_payment_receipt.pdfIn PDF document text
    • https://taxubixud.weebly.com/uploads/1/3/4/7/134760406/3aa48bb957ec.pdfIn PDF document text
    • https://cdn.sqhk.co/vuwipabobatu/gdFhHS5/74502689378.pdfIn PDF document text
    • https://cdn.sqhk.co/dolitife/arrgRM8/metropcs_phone_number_pay_bill.pdfIn PDF document text
    • https://lurafavef.weebly.com/uploads/1/3/0/8/130813461/sososazupanisadijijo.pdfIn PDF document text
    • http://turajenapadefo.22web.org/9650245124.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5451e00-4cd7-4057-919b-ab79a1e7ea6a/ti_ba_ii_plus_professional_case.pdfIn PDF document text
    • https://s3.amazonaws.com/zamuriza/84155969152.pdfIn PDF document text
    • http://lasikisitikuve.epizy.com/retorirolovegawid.pdfIn PDF document text
    • http://zixufiwama.rf.gd/aisi_1020_standard.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d023406-301d-4ce2-8c79-ea95889f290e/why_text_is_important.pdfIn PDF document text
    • https://s3.amazonaws.com/genukopapovixo/gavanexediferukumifuso.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d072bc7-d4b0-4dd5-9193-7e41bd9e9bcb/speed_queen_top_load_washer_issues.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4241e806-88a2-4b79-b456-7d9d288642b2/el_nombre_de_la_rosa_resumen_personajes.pdfIn PDF document text
    • http://gelepovasogadax.epizy.com/lelalemunumujigel.pdfIn PDF document text
    • https://s3.amazonaws.com/pugomonapoxuxe/linilalo.pdfIn PDF document text
    • https://s3.amazonaws.com/jajoxulabojaso/64179192481.pdfIn PDF document text
    • https://s3.amazonaws.com/xotomisen/pan_card_form_for_partnership_firm.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d0d14d7-57f1-4248-a151-e5851ed9885b/how_to_pair_ue_megaboom_speakers_together.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_off00013a88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A88 4996 bytes
SHA-256: 78b92081559ea64aa43681aa2b7b436eb10b6fa9e6284cd3ce736d3277a018dc
font_01_sfnt_off00014b8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B8B 10896 bytes
SHA-256: af74ee00e9c380898d1bdac095bdb5b307c1218ae3776303d2307484b2838e83

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