Malicious PDF — malware analysis report

Static analysis result for SHA-256 362c79ff05d5e8b6…

MALICIOUS

PDF

80.8 KB Created: 2021-03-21 23:01:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: cbaccffc9ffddcb665221ac2ba1f0530 SHA-1: 935cb3e0319322d40b31d23f5d834261eaf07d6e SHA-256: 362c79ff05d5e8b639ac67b134b2b846739325cbccdaa7b8fe7f1cd214d2a1fb
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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.
  • 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://xezojetit.ru/strik?utm_term=i+am+watching+you+book+reddit PDF link annotation
    • https://cdn.sqhk.co/jigugabopu/hjhfuaW/ai_using_python_code.pdfIn PDF document text
    • https://cdn.sqhk.co/lokemoxire/PhihihU/zuburuxapevi.pdfIn PDF document text
    • https://pasikozadiru.weebly.com/uploads/1/3/1/3/131384374/jogugevoxati_banaxufulebomi_fupenodexigora_xapaloxe.pdfIn PDF document text
    • https://cdn.sqhk.co/xutazazo/C6UJhbd/90890474628.pdfIn PDF document text
    • https://panidulupeju.weebly.com/uploads/1/3/0/9/130969186/2325929.pdfIn PDF document text
    • https://cdn.sqhk.co/mukibusu/ibhhibk/hover_1_kart_and_all_star_hoverboard_combo.pdfIn PDF document text
    • https://cdn.sqhk.co/pafevola/jiIhjO9/nemuwaselim.pdfIn PDF document text
    • https://xajifopuref.weebly.com/uploads/1/3/3/9/133999146/leneforax_gavuvulini_segujitev_zetivoru.pdfIn PDF document text
    • https://cdn.sqhk.co/jakabapewuv/jjhc2bn/42901176316.pdfIn PDF document text
    • https://cdn.sqhk.co/mudifuto/ZBUjaib/79094340659.pdfIn PDF document text
    • https://cdn.sqhk.co/dasotipamu/Zgfjbhd/stampede_definition_oxford.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wopari/effectiveness_of_online_advertising_project.pdfIn PDF document text
    • https://s3.amazonaws.com/tunenijexe/18776092075.pdfIn PDF document text
    • https://s3.amazonaws.com/bagisi/66430656188.pdfIn PDF document text
    • https://9fb0fece-6c2a-4f8b-8ff1-5d9ea67f5ee7.filesusr.com/ugd/f6a907_6d567c7c2e8d48e78b8bc5cfe1f71ce0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lixuzo/moto_car_racing_games_free.pdfIn PDF document text
    • https://s3.amazonaws.com/ragejufa/15450818083.pdfIn PDF document text
    • https://s3.amazonaws.com/gozifep/vosuwimekuvavanibaregab.pdfIn PDF document text
    • https://73c25812-7308-4b32-b985-10e2a25710ca.filesusr.com/ugd/5b604d_bb1f2214443549d9a5489f51ec456f69.pdf?index=trueIn PDF document text
    • https://d5fb4b5d-766d-4e54-ab1c-ecc61d2b7d82.filesusr.com/ugd/b0c8dc_4d98e90c392e4f53b7c2ee58f8fecd74.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nigimul/29459263412.pdfIn PDF document text
    • https://d4bcd744-2348-4fe3-9006-05b2fcbd3cbd.filesusr.com/ugd/704566_a04d294f6e9d473a8211ef29c96f1c44.pdf?index=trueIn 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_off0000fc03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC03 5476 bytes
SHA-256: 89d27bd415042a188ea01144f95e06b4738a078cdbd94d37393e50320acf19a8
font_01_sfnt_off00010e90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E90 11072 bytes
SHA-256: eba67a176923bace1ced669c64fedbf71f9b2e18e303084d00e4fd16316a6283

Open this report in the interactive analyzer, or submit your own file for analysis.