Malicious PDF — malware analysis report

Static analysis result for SHA-256 729edead26b93bb6…

MALICIOUS

PDF

77.4 KB Created: 2021-02-16 13:46:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 473d880b72d4df180e710b8d3bd92ee2 SHA-1: 503c83490148621f9e2904b65cdcfdca0bc82263 SHA-256: 729edead26b93bb6f82ba6277271911b66901bce0c1289955591e76e17fae184
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file contains a large number of external links, many pointing to disposable domains and Weebly-hosted PDFs, as indicated by the PDF_SEO_LINK_FARM and PDF_SEO_DISPOSABLE_LINK_FARM heuristics. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or distributing further malware. The embedded URLs and the nature of the link farm suggest an attempt to manipulate search engine results or lead users to malicious sites.

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://bologen.ru/strik?utm_term=plans+for+a+portable+shooting+bench PDF link annotation
    • https://linerebe.weebly.com/uploads/1/3/0/8/130813546/9912602.pdfIn PDF document text
    • https://visigeporoxibus.weebly.com/uploads/1/3/4/1/134131572/kanugef-savalowamo-bugarokan-gigelukiwijez.pdfIn PDF document text
    • http://santecmb-sarl.com/913046983999qfe0.pdfIn PDF document text
    • https://kemiponoza.weebly.com/uploads/1/3/4/6/134605011/zozotuger-xofomilalefig-lutuzukofob-botugewefa.pdfIn PDF document text
    • http://santand-es.com/torn_rotator_cuff_recovery_periodjhfxo.pdfIn PDF document text
    • https://fupopafesuz.weebly.com/uploads/1/3/4/4/134443157/1600275.pdfIn PDF document text
    • https://nipobajomofak.weebly.com/uploads/1/3/4/6/134641158/tujixetif-ziruwepu.pdfIn PDF document text
    • https://nurinakeviwiket.weebly.com/uploads/1/3/1/4/131407921/gaguvinunix.pdfIn PDF document text
    • https://bapefakujina.weebly.com/uploads/1/3/4/4/134483882/zememabesizonew_giguvedivo_govetupodili_dewisu.pdfIn PDF document text
    • https://cdn.sqhk.co/xefijumu/AUBQhjg/jibeje.pdfIn PDF document text
    • https://dotofinadi.weebly.com/uploads/1/3/0/7/130740455/kixexivepux.pdfIn PDF document text
    • https://bozadabeduli.weebly.com/uploads/1/3/4/8/134869561/tolafupikovizud.pdfIn PDF document text
    • https://govoxarenaja.weebly.com/uploads/1/3/4/8/134874143/gilebegitowatugage.pdfIn PDF document text
    • https://cdn.sqhk.co/tegasipitif/hahf0Z9/battle_arena_games.pdfIn PDF document text
    • https://kivalake.weebly.com/uploads/1/3/4/8/134885121/tagukasobufu.pdfIn PDF document text
    • https://luvisumor.weebly.com/uploads/1/3/5/3/135390586/gororege.pdfIn PDF document text
    • http://creditreportusa.info/142479091729mc16.pdfIn PDF document text
    • http://copyright-notice-ig.com/30130616418rw9pl.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://fazemiwasagi.epizy.com/calculator_hide_app_uptodown.pdfIn PDF document text
    • http://butadiviwev.rf.gd/assistive_touch_for_iphone_5.pdfIn PDF document text
    • http://konemuga.epizy.com/aws_cloud_interview_questions_and_answers.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_off0000e2ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2CA 5208 bytes
SHA-256: 86fa0e335273703a7cb4439501d4726a41b63a97d3a6e167a715956066379c66
font_01_sfnt_off0000f46b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF46B 11076 bytes
SHA-256: 9619b2d62451a02d03870f3f0066f5b83b5fbef0337baa5b57526e7c3e7b24f0
font_02_sfnt_off000119bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119BB 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e