Malicious PDF — malware analysis report

Static analysis result for SHA-256 267251815b1ea736…

MALICIOUS

PDF

67.8 KB Created: 2021-02-13 05:26:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 59825abdccbc9f390d56a31fc15c90c6 SHA-1: 82cce89b54932e989fa1056c2f31494c2cef5780 SHA-256: 267251815b1ea736e0797a72ac7a172e14800ba356bc4bb083797b55c09d8f92
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URIs, with a high-confidence ML classifier and ClamAV detection indicating malicious intent. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the document is designed to host many links on disposable domains, likely to distribute malicious content or conduct phishing. No scripts were extracted, but the presence of external links points to a potential download or redirection to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://seumenha.ru/wix?keyword=balance+number+sentences+worksheets PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4485161/normal_60273fdec56fb.pdfIn PDF document text
    • https://cdn.sqhk.co/busanurutar/fz9hfYm/arkham_horror_card_game_card_list.pdfIn PDF document text
    • https://cdn.sqhk.co/bedepekemat/fJwT2Cy/stack_it_up_lil_yachty_lyrics.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384046/normal_5ff7bea542950.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409818/normal_5fe3b6f99e775.pdfIn PDF document text
    • https://cdn.sqhk.co/malevevipali/diihajc/54367439585.pdfIn PDF document text
    • https://baxelawinojiw.weebly.com/uploads/1/3/4/3/134333718/1160067.pdfIn PDF document text
    • https://birivuben.weebly.com/uploads/1/3/4/6/134618962/gamolivurotavi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369161/normal_6021417ad409e.pdfIn PDF document text
    • https://cdn.sqhk.co/fusojafiza/gcgfije/14030503994.pdfIn PDF document text
    • https://meligobuv.weebly.com/uploads/1/3/1/0/131070858/gogod-xogef-jiresaseja-pebadapenipuwon.pdfIn PDF document text
    • https://lewezuwarekizes.weebly.com/uploads/1/3/4/0/134040914/rutorebisapagem-mevunigoxi.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/rizoli/access_bars_head_chart.pdfIn PDF document text
    • https://s3.amazonaws.com/suximawo/65102827805.pdfIn PDF document text
    • https://s3.amazonaws.com/wanasuvedigo/chapter_27_apush_test_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/robumuduluwise/printable_inference_worksheets_for_4th_grade.pdfIn PDF document text
    • https://s3.amazonaws.com/vonuxagupeduze/73890535294.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cd28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD28 5384 bytes
SHA-256: 8ae332fc2361a2082e5be1feb07a1a67e16dc55eb01cc6253f20725c21bf3821
font_01_sfnt_off0000df5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF5C 10288 bytes
SHA-256: c4204cea5421c787e107756212a244a504ec609521f8c30301bda1e40b273c65

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