Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b3f882648912b64…

MALICIOUS

PDF

84.6 KB Created: 2020-11-19 07:41:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 573d0bbcca50921b507fdfdd5a79dda8 SHA-1: 980cd4ee738f74efac8019800e4fa570c778f612 SHA-256: 5b3f882648912b6486232b970192aa143f297570473a913f0482116956c9d6ea
214 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics, including a critical finding for linking to known malicious redirector infrastructure. The file contains a large number of embedded links, many of which point to external PDFs, suggesting a link farm or redirection scheme. The presence of a malicious redirector URL indicates an attempt to lead the user to a harmful site, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffmen.ru/123?utm_term=g+minor+scale+chords
    • https://sexiguviwuzokal.weebly.com/uploads/1/3/4/6/134687255/murotonetatiki_tuzogiseg.pdf
    • https://cdn-cms.f-static.net/uploads/4368955/normal_5fac44a3956ac.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/fizijosoraginu/just_ask_ford.pdf
    • https://uploads.strikinglycdn.com/files/ff886582-24cc-4616-b3e8-388f7be7818e/king_james_bible_study_guide.pdf
    • https://uploads.strikinglycdn.com/files/be0779fe-a1cf-4640-b784-d87326da594a/tujasedesukafesesedob.pdf
    • https://s3.amazonaws.com/tetazino/22028738540.pdf
    • https://s3.amazonaws.com/betefowubevat/graco_pack_n_play_user_manual.pdf
    • https://uploads.strikinglycdn.com/files/1b5fa595-8b02-4620-91a2-04ad4ab1b4c7/mechwarrior_4_mercenaries_trainer.pdf
    • https://s3.amazonaws.com/dorulusof/que_es_el_contexto_aulico.pdf
    • https://s3.amazonaws.com/jedaxopopuko/mikasa_dinnerware_sets_in_costco.pdf
    • https://uploads.strikinglycdn.com/files/95a5ddf6-0ea8-4395-acbc-a8d97902f501/wakanis.pdf
    • https://uploads.strikinglycdn.com/files/aef264b6-07c8-4faa-b823-23ffb5ec2627/warriors_orochi_4_wikia.pdf
    • https://s3.amazonaws.com/jivuxo/jacques_bainville_petite_histoire_de_france.pdf
    • https://uploads.strikinglycdn.com/files/26af1c31-fa3a-458e-b052-dbc807c7c050/793481271.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_off0000fc34.bin
8a4100bd9a069442060219c14d70f5e840d63912e059cd96ef86211b55038357		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFC34 5212 bytes
font_01_sfnt_off00010dba.bin
183777125fc2f475f2324b489e99ef2937a21657b62da182fd088f267028a9f7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10DBA 10116 bytes
font_02_sfnt_off0001309b.bin
46d9b83afd797048ab251ddfc9ca9a6db44f3280724c231f6a80a061bcc6fc12		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1309B 16120 bytes

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