Malicious PDF — malware analysis report

Static analysis result for SHA-256 beb7d1be839098eb…

MALICIOUS

PDF

113.1 KB Created: 2021-04-05 19:19:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0ab142bf3473e54322a4b45729f96a68 SHA-1: b2a9b925264211e2873ac3850ea61ad3dccadb47 SHA-256: beb7d1be839098eb1cbdb3488b07fb876dc5b063b8b05dcfabf7e96a8403182d
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains a large number of external links, a technique often used for SEO manipulation or to redirect users to phishing or malware distribution sites. While no scripts were explicitly extracted, the PDF structure and the presence of external URIs suggest it's designed to lead users to malicious content hosted elsewhere.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://zajinet.ru/wix?keyword=echo+show+5+user+manual
    • https://cdn.sqhk.co/sibamoxa/FihjbyA/bingo_bombo_tokens_gratis.pdf
    • https://cdn-cms.f-static.net/uploads/4380522/normal_5fe82601747a5.pdf
    • https://cdn.sqhk.co/titipubaduw/ghp7ogg/jelly_shift_game.pdf
    • https://cdn.sqhk.co/pofaxexaxi/qNxjjgj/hockey_jersey_sports_direct.pdf
    • https://revogofoti.weebly.com/uploads/1/3/3/9/133999152/mavamekabopiz-kebat-wiromunu-fijadu.pdf
    • https://cdn.sqhk.co/zesonixiv/3jh2Ggc/eclipse_java_ide_version_3._6_helios.pdf
    • https://wusaveverafojiz.weebly.com/uploads/1/3/4/3/134338410/fuwisegene.pdf
    • https://cdn.sqhk.co/rabataxuvax/idVwsDa/vajetixikawitosiri.pdf
    • https://resewirebibabap.weebly.com/uploads/1/3/1/3/131379054/50ac880453.pdf
    • https://cdn.sqhk.co/dudumadopole/JFhjjaQ/drum_set_games_2.pdf
    • https://cdn-cms.f-static.net/uploads/4426261/normal_60311f6c57470.pdf
    • https://cdn.sqhk.co/xajevedu/sijCSij/guide_ink_inc_tattoo_tycoon_mod.pdf
    • https://static.s123-cdn-static.com/uploads/4459165/normal_5fc683bc2c60e.pdf
    • https://cdn-cms.f-static.net/uploads/4468294/normal_60352531d8ac3.pdf
    • https://nupewaxupojiga.weebly.com/uploads/1/3/4/0/134042887/e27a09fe6.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/ca352267-e8dd-4505-9390-775d12b32146/vitobiditeti.pdf
    • https://uploads.strikinglycdn.com/files/14852fda-9ce4-4b7a-88c5-677971834371/brother_xr9500prw_embroidery.pdf
    • https://uploads.strikinglycdn.com/files/8cebbcdc-e936-4b76-9228-6533cc444a21/fourier_sine_transform_of_e-x_cos_x.pdf
    • https://uploads.strikinglycdn.com/files/6d8b2a63-2f3f-4094-92e6-89d1110d1705/fender_mustang_i_v2_20w_1x8.pdf
    • https://uploads.strikinglycdn.com/files/902ed742-559a-472b-82ca-f73c2a596464/pazenezafezama.pdf
    • https://uploads.strikinglycdn.com/files/d82977d6-09b3-4c05-9205-40511ef9b864/5135273515.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00017fa9.bin
97f2641731a2393c01e802548977a06b2599fc1db74ba0c6bfbd3ed671cbcf7e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17FA9 5212 bytes
font_01_sfnt_off00019151.bin
5561c997256cbd73cac5ac33086b9f6ba9fb948ee8bf02fa3b1d75cb026c8252		 pdf-font-stream PDF embedded font (sfnt) at offset 0x19151 11360 bytes

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