Malicious PDF — malware analysis report

Static analysis result for SHA-256 9112d86f64d70b90…

MALICIOUS

PDF

78.5 KB Created: 2021-01-20 01:28:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: e2054faf216b269577394b371fd3826f SHA-1: bf64e0bf9fd9bf9afc98788ac2f24ed80eea3f66 SHA-256: 9112d86f64d70b90bbcdca6721901d9bddf04b9203c4300bf399c5b91bb503b9
214 Risk Score

Malware Insights

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

This PDF file was flagged by multiple critical heuristics as malicious, including a redirector link and a link farm. The ML classifier also assigned a high probability of maliciousness. The embedded URLs suggest a phishing or malware distribution attempt, likely initiated via spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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.
  • 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://ggtraff.ru/123?utm_term=dremel+accessory+guide+poster In PDF document text
    • https://cdn-cms.f-static.net/uploads/4424011/normal_5f9cb45b8f9b0.pdfIn PDF document text
    • https://cdn.sqhk.co/moranunemuk/bjcuwzJ/24619796575.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369646/normal_5f9887cd4b951.pdfIn PDF document text
    • https://wojawiso.weebly.com/uploads/1/3/0/8/130813991/86b7651eda9653.pdfIn PDF document text
    • https://cdn.sqhk.co/busanurutar/dhfCoaO/durafudibuwas.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426815/normal_5fd04b15b0f6b.pdfIn PDF document text
    • https://cdn.sqhk.co/tevotapomow/jfK0f6a/93770137959.pdfIn PDF document text
    • https://cdn.sqhk.co/sovokeduseb/ObNrXij/july_1864_civil_war_battles.pdfIn PDF document text
    • https://cdn.sqhk.co/lutidofele/djcGXSp/arena_stage_dc_schedule.pdfIn PDF document text
    • https://cdn.sqhk.co/momewoziwoge/jzPieNs/jumping_frog_game_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/miwurazaz/gdghQjc/download_game_mountain_shooting_sniper_mod.pdfIn PDF document text
    • https://guvepilafofifiv.weebly.com/uploads/1/3/4/6/134682232/zuzowuli.pdfIn PDF document text
    • https://cdn.sqhk.co/berirenike/gj3Amid/sawopozagofosivate.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jukikusikodopom.epizy.com/gb_whatsapp_apk_ultima_version_2019_antiban.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC64 5496 bytes
SHA-256: e398bbe1cf6a651448bbb0843a2d63d2e37eda2f44be4596f4ddca87a74d5d24
font_01_sfnt_off0000ff00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF00 1800 bytes
SHA-256: e9a5a1f6ed95b1e3669933bb00002ad32a1708c3e0b735191cad5e02368a6c7d
font_02_sfnt_off0001078e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1078E 10732 bytes
SHA-256: a901c2a1abfbce1f825baffbae5012f843a40f8477b3dff7ba8897852431742f

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