Malicious PDF — malware analysis report

Static analysis result for SHA-256 adf26b5cd9439d3d…

MALICIOUS

PDF

80.4 KB Created: 2021-04-01 07:39:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 45796d45cd9e62ed134f8b9a1e1549f5 SHA-1: 15a65a616b54b7db7443383c668c76f5dea183c2 SHA-256: adf26b5cd9439d3dcb5c13aee9f2940f5c980eb17f3c8ebf96cb25da1cf1cc43
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics and an ML classifier. It contains a large number of external links, including a link farm designed for SEO manipulation, and is detected by ClamAV as a phishing trojan. The embedded content suggests it is intended to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://leonvi.ru/wix?keyword=the+wrath+and+the+dawn+book+pdf
    • https://static.s123-cdn-static.com/uploads/4417138/normal_5ff9140cddb9c.pdf
    • https://cdn-cms.f-static.net/uploads/4445890/normal_60554d231879d.pdf
    • https://jewezuwexokuj.weebly.com/uploads/1/3/4/7/134717424/6344733.pdf
    • http://momentikshop.space/what_is_required_to_get_a_private_investigator_licensehozgb.pdf
    • https://finijigif.weebly.com/uploads/1/3/2/6/132681422/97efb4aa5.pdf
    • https://bexusisase.weebly.com/uploads/1/3/4/5/134596812/7e6d39.pdf
    • http://lnstagram-helps-contact.com/xozanaronularuwigovariwiz6p2lk.pdf
    • https://melonugijiroduk.weebly.com/uploads/1/3/5/3/135325977/xadapanuligi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/gavapozalilup/xomoluda.pdf
    • https://uploads.strikinglycdn.com/files/564ab48b-c892-4dc6-871c-c277c3dfb27d/tamomafumix.pdf
    • https://uploads.strikinglycdn.com/files/7a8595f7-1ee5-4f13-ae92-2ee1ff3a66a6/mezimuloveluponiviti.pdf
    • https://uploads.strikinglycdn.com/files/b24a7c59-4f74-4de3-87c8-19caa02eb4e7/ejercicios_verbos_irregulares_presente_espaol.pdf
    • https://uploads.strikinglycdn.com/files/892a4188-38af-4643-8265-cf900c785022/97530411544.pdf
    • https://uploads.strikinglycdn.com/files/71d30d2b-963a-4a4a-8632-c6a2f1fa2382/107356464.pdf
    • https://uploads.strikinglycdn.com/files/14e1fb3d-c93c-4eca-8ad6-b9378b6211f9/chrysanthemums_in_chinese.pdf
    • https://s3.amazonaws.com/paxivogedewilu/how_to_reset_password_on_vtech_phone.pdf
    • https://uploads.strikinglycdn.com/files/5bf7be25-a8f7-4ce8-b390-0a75d2fa1f8f/23791325317.pdf
    • https://uploads.strikinglycdn.com/files/afaf4ebd-9b5d-4966-b8a9-5d1c658df51b/qu_es_una_funcin.pdf
    • https://s3.amazonaws.com/resabomibogodaw/manual_pentax_k3_ii_espaol.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e72e.bin
5d2b06eddd8923265ad51b6ffd3e86c592a52b5cf74890750452d55727a27bff		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE72E 5164 bytes
font_01_sfnt_off0000f8c7.bin
5fda8623a0c321595d4fa145ca1d22c16e46b12e0334915aecb75e09b536f75e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF8C7 11448 bytes
font_02_sfnt_off00011f4b.bin
e9fe716c2abc985b12a899a49d5539e4e8be1b56d50c083b30290d85a2a7c848		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11F4B 16092 bytes

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