Malicious PDF — malware analysis report

Static analysis result for SHA-256 cbe9a15f03220e2a…

MALICIOUS

PDF

70.3 KB Created: 2021-01-10 06:44:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 0974229adba13120e7021db638738042 SHA-1: 289589def168d44f78e62f5e3efda8540d82d734 SHA-256: cbe9a15f03220e2a5b046a6e7260474881aed018c85bf5157e861173a347a49b
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file is classified as malicious by ML and ClamAV, indicating a phishing or trojan threat. It contains numerous external URIs and is identified as a link farm on disposable hosting, suggesting an attempt to redirect users to malicious sites. The embedded URLs and the nature of the heuristics strongly suggest this document is part of a phishing campaign designed to lead users to compromised or malicious web content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffine.ru/123?utm_term=three+little+pigs+shakespeare+script PDF link annotation
    • https://cdn.sqhk.co/zetikitor/bxia3fq/91839664963.pdfIn PDF document text
    • https://site-1166608.mozfiles.com/files/1166608/italian_love_song_lyrics_in_english.pdfIn PDF document text
    • https://site-1171714.mozfiles.com/files/1171714/mojakoxawusobifufabar.pdfIn PDF document text
    • https://site-1175775.mozfiles.com/files/1175775/26544243875.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377905/normal_5f955161765b1.pdfIn PDF document text
    • https://cdn.sqhk.co/jawezumate/gHeUwhj/navy_battleship_survival_warner_springs.pdfIn PDF document text
    • https://cdn.sqhk.co/majumoros/chgiaCX/fm_wonderkids_strikers.pdfIn PDF document text
    • https://site-1168098.mozfiles.com/files/1168098/rome_total_war_barbarian_invasion_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/dipujabuxiw/dWKnifG/two_guns_arizona_route_66.pdfIn PDF document text
    • https://cdn.sqhk.co/tivuzofep/ghhbidi/ninja_blender_1200.pdfIn PDF document text
    • https://site-1173627.mozfiles.com/files/1173627/45461596331.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/dufekifaral/vcf_to_csv_converter_software_free.pdfIn PDF document text
    • https://s3.amazonaws.com/guvovigo/xtreme_fat_loss_diet.pdfIn PDF document text
    • https://s3.amazonaws.com/kezemiradigu/create_index_of_sheets_in_excel_2010.pdfIn PDF document text
    • https://s3.amazonaws.com/tokit/47459076309.pdfIn PDF document text
    • https://s3.amazonaws.com/vetamedisoz/widufeno.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_off0000d716.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD716 5208 bytes
SHA-256: 0e97fad6d73afbb2da4c4caa22e6d093bda36ab94f98646e86667e3eee7625af
font_01_sfnt_off0000e8cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8CD 10252 bytes
SHA-256: 6d51a9efec078b044638d423ae1e04c2492cda6514153c6204822be93d9868f8

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