Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7a6c699701335ad…

MALICIOUS

PDF

72.4 KB Created: 2020-12-06 13:15:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: a6fe688a403d49cceaa8aff93047b887 SHA-1: ccae7e06e682e85af398d06da2bf204e6b8c5d99 SHA-256: d7a6c699701335ad4aaff996a6d11860064451d02554e475dcaf9e5fc79493b0
156 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for an SEO redirector link, specifically identified as a 'free-download phishing' lure. The embedded URL `https://trafficel.ru/strik?utm_term=spoken+english+book+in+hindi` is the primary indicator of this malicious intent. While no scripts were explicitly extracted, the PDF structure and the nature of the URL suggest it's designed to exploit user trust for malicious purposes, likely leading to a secondary download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Malformed active-content stream length medium PDF_MALFORMED_EXPLOIT_STREAM_LENGTH
    A PDF stream that carries active/exploit-looking content has a declared /Length that does not match the recovered stream body. Malformed stream boundaries and length mismatches are common parser-evasion/supporting evidence around Reader exploit streams.
  • 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://trafficel.ru/strik?utm_term=spoken+english+book+in+hindi PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369327/normal_5faa7cc1a2654.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374380/normal_5fb729d40bb8e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd08e9dae50a014588dd44/1606224106605/mennonite_white_head_covering.pdfIn PDF document text
    • https://s3.amazonaws.com/xetasif/novela_amor_eterno_en_univision.pdfIn PDF document text
    • https://s3.amazonaws.com/gekixadonuru/medela_swing_breast_pump_user_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/genedesowul/professional_pitch_deck_template_free.pdfIn PDF document text
    • https://s3.amazonaws.com/tifemuma/puzewilepoloxetewap.pdfIn PDF document text
    • https://s3.amazonaws.com/polexebuj/namudowanezezujo.pdfIn PDF document text
    • https://s3.amazonaws.com/rodakarugupoko/algebra_vocabulary_crossword_puzzle_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5ec0424-3c6e-4334-8cc2-5e0e29910364/wings_of_fire_icewing_seawing_hybrid.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_off0000e08e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE08E 5224 bytes
SHA-256: a7d487fe302d9294963c45b90aabf91bbef684c5896ae6936b38098f7df5920b
font_01_sfnt_off0000f24f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF24F 10092 bytes
SHA-256: 9bcd69ad0561bb1236649881fdaaa7d253f6ee778383e015c4a51f4643de9636