Malicious PDF — malware analysis report

Static analysis result for SHA-256 7584d9cd11f83195…

MALICIOUS

PDF

76.1 KB Created: 2021-03-25 00:40:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 422f47f75d90ce2b4c83f50a705b083c SHA-1: 0d834ca2813343f937937724ed42979f5bf435da SHA-256: 7584d9cd11f8319532eb75669b491556f73af4261cf28d0931e2075acc5dc4eb
186 Risk Score

Malware Insights

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

The PDF file contains a significant number of external links, many pointing to disposable domains, indicative of a link farm designed to distribute traffic. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. The embedded URLs and the nature of the heuristics point towards an attempt to lure users to external sites, potentially for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/wix?keyword=mega+man+10+wily+castle+boss+weaknesses PDF link annotation
    • https://cdn.sqhk.co/lasesekov/ihha2ic/magic_wand_tool_photoshop_2020_missing.pdfIn PDF document text
    • http://votewimuvuxa.iblogger.org/29282642724.pdfIn PDF document text
    • https://cdn.sqhk.co/xurajalijok/gg49iiz/47335491969.pdfIn PDF document text
    • http://1s.london/keto_ketones_guidek14nv.pdfIn PDF document text
    • http://okstore.info/60770392252yfi3t.pdfIn PDF document text
    • https://cdn.sqhk.co/tategupet/Wjgahib/44626046809.pdfIn PDF document text
    • https://cdn.sqhk.co/ponajadu/djegfK3/medieval_kingdom_wars_cheat_engine.pdfIn PDF document text
    • http://sizijevoji.iblogger.org/animal_story_in_english.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419857/normal_604152e09f5c3.pdfIn PDF document text
    • https://cdn.sqhk.co/jabakujivim/1BycL1R/20621638772.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500189/normal_602a35e64aa3a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462036/normal_600e5a092380c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426408/normal_6003ed194d6bc.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
    • https://2c8134a4-d865-4da1-8961-c755d7242105.filesusr.com/ugd/6dcf04_cf532e874d284c3c8d2f9ddfa845c57b.pdf?index=trueIn PDF document text
    • https://538d8494-0c7d-401a-b890-0485f6bc7bca.filesusr.com/ugd/29c71c_33e99d4935ee483c9eb18de314e32de7.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/643b29ef-6423-43c2-9597-5eee43a4dce6/how_to_use_a_chefs_choice_300_knife_sharpener.pdfIn PDF document text
    • http://wozawexopad.epizy.com/lung_cancer_journal_author_guidelines.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a0a1ec8-a5e1-4221-99bb-37e82295d341/kemobatajabavum.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_off0000ddd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDD0 5408 bytes
SHA-256: 2382ad3b4ae900e030be713a0982aa77ce972f57562f9564c22affc1c5682c42
font_01_sfnt_off0000f046.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF046 10800 bytes
SHA-256: ea41edb37cd51ea7c59620186e14eb8988e7c6908da433322759e7b754453963
font_02_sfnt_off00011527.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11527 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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