Malicious PDF — malware analysis report

Static analysis result for SHA-256 10d8379d62cdb202…

MALICIOUS

PDF

62.3 KB Created: 2021-01-13 03:46:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 029e7c71961e22932a3d35732d7c1ddd SHA-1: 7fa9504ccc39cdcab892734156471cf65a3f7766 SHA-256: 10d8379d62cdb202bceb877c0318be54409c9d223e28ee0b199e19576314fc5c
184 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, specifically identified as a phishing trojan. It contains numerous embedded links, with at least one pointing to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text related to product sales, suggesting a lure for phishing or potentially malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 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.
  • 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://gettraff.ru/wb?keyword=nike%20sports%20bra%20sale%20nz In PDF document text
    • https://site-1175166.mozfiles.com/files/1175166/bricks_and_balls_hack_mod_apk.pdfIn PDF document text
    • https://vakikuxikedeti.weebly.com/uploads/1/3/5/3/135320305/welomokunuketawomix.pdfIn PDF document text
    • https://site-1175916.mozfiles.com/files/1175916/mortal_kombat_xl_moves_list_ps4_raiden.pdfIn PDF document text
    • https://site-1180999.mozfiles.com/files/1180999/33412473624.pdfIn PDF document text
    • https://site-1168326.mozfiles.com/files/1168326/space_defender_battle_infinity_3ds_review.pdfIn PDF document text
    • https://site-1172508.mozfiles.com/files/1172508/6503879138.pdfIn PDF document text
    • https://site-1243289.mozfiles.com/files/1243289/legendarni_tytani_gra.pdfIn PDF document text
    • https://cdn.sqhk.co/sujutowupolu/7hfsmh2/34180121555.pdfIn PDF document text
    • https://site-1174052.mozfiles.com/files/1174052/dj_sound_effects_horn_free_download.pdfIn PDF document text
    • https://site-1246101.mozfiles.com/files/1246101/80483376690.pdfIn PDF document text
    • https://cdn.sqhk.co/vimanagadu/bijRjeZ/rofuxugijowezasam.pdfIn PDF document text
    • https://bavamelamasol.weebly.com/uploads/1/3/4/7/134714994/rezug.pdfIn PDF document text
    • https://roturusuwanowus.weebly.com/uploads/1/3/4/3/134363773/3a8e7881cd42cc7.pdfIn PDF document text
    • https://site-1168513.mozfiles.com/files/1168513/yeezy_supply_australia_legit.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000bbd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBBD9 5036 bytes
SHA-256: efddf2f8a08bab789ecbba66e703d65a9b189ac477ffda633412c8a3b6b94bdf
font_01_sfnt_off0000cd0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD0F 9200 bytes
SHA-256: b39fef9986b9c56b751388637681452d386e1484581afbedf92e922b5f8577ba

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