Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee567e26ebf01c01…

MALICIOUS

PDF

80.8 KB Created: 2020-11-26 01:09:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 77a6e495dc554a0ce2db356f8a4482a3 SHA-1: b5072c216286db77e35a50bd9f2497d26218c995 SHA-256: ee567e26ebf01c01b786de071348235fc13ccc8a0607453247dd0b8b2415a986
186 Risk Score

Malware Insights

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

This PDF file is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm or SEO spam operation. The primary URL, 'https://trafftec.ru/strik?utm_term=fun+games+unblocked+77', is likely part of a phishing or malware distribution scheme.

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://trafftec.ru/strik?utm_term=fun+games+unblocked+77 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4411701/normal_5fbc0b822cccf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365594/normal_5f89b53b6f81c.pdfIn PDF document text
    • https://besogedawifajop.weebly.com/uploads/1/3/4/2/134234635/fekesiwagutop.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388160/normal_5f902fb807874.pdfIn PDF document text
    • https://wavixupenug.weebly.com/uploads/1/3/4/3/134386336/e7ee7dba02dda.pdfIn PDF document text
    • https://sejevijuwev.weebly.com/uploads/1/3/2/7/132712154/derukulodazet-pajuwud-nagadazefi-buwaxakolisib.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407102/normal_5fbb8b31742b6.pdfIn PDF document text
    • https://gijifapezikad.weebly.com/uploads/1/3/4/6/134644128/rezum.pdfIn PDF document text
    • https://zemodeviwiteg.weebly.com/uploads/1/3/4/3/134351550/jomikebovit-mutonazixox-redanixisatu.pdfIn PDF document text
    • https://juzowugaf.weebly.com/uploads/1/3/4/7/134773334/9857643.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://uploads.strikinglycdn.com/files/fff8d0dd-4122-4174-a4b1-c3601a24d128/foluninov.pdfIn PDF document text
    • https://s3.amazonaws.com/zufojadibi/lilly_pulitzer_pottery_barn_sheets.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a1beb4e-6b39-4dd9-8867-1b0e900a04b9/microsoft_excel_2016_functions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1377cc5-d9a4-4cce-9b61-85f695b0ccec/nifepixevuwaranavivo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/30122680-7c23-4e2a-a285-a2889e6acd60/dr._guadalupe_mercedes_rodriguez_palacios.pdfIn PDF document text
    • https://s3.amazonaws.com/vuforewebub/julius_caesar_study_guide_act_2_scene_2.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_off0000f219.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF219 5156 bytes
SHA-256: 558ef56639ef875df18485ca56d9a936039ab0c4e62b3a23af8e0e9558a4e875
font_01_sfnt_off0001038b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1038B 10916 bytes
SHA-256: 5849a3ae4cb5770251716f555ae93e7f538e9a0bfe8666f097f71221c75a20cc
font_02_sfnt_off0001288d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1288D 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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