Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fe2e2d89fd5a86e…

MALICIOUS

PDF

96.2 KB Created: 2021-06-05 22:42:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 9477ac7fbf783fb52cbf1f5e6e352d6a SHA-1: 04e1f2bff6ec76dedc66ae060ddfc386bcef6b11 SHA-256: 5fe2e2d89fd5a86e16984ba7432226bc1eaaea7afa32ffdd11fe826fbf88c66b
126 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one prominent URL suggesting a lure related to 'broken ankle rehab exercises pdf'. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for link farms, and the ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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 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://oniceh.ru/pbw?utm_term=broken+ankle+rehab+exercises+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4411252/normal_5fe1382f49ff4.pdfIn PDF document text
    • https://taponoranasigem.weebly.com/uploads/1/3/4/6/134643922/4526820.pdfIn PDF document text
    • https://sejiganabukuja.weebly.com/uploads/1/3/4/5/134585043/vewutarisepo-foruxe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485318/normal_602b5ac3763fc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382408/normal_604b80714c16e.pdfIn PDF document text
    • https://lugapageragije.weebly.com/uploads/1/3/4/6/134617753/3821126.pdfIn PDF document text
    • https://zunolerafoxate.weebly.com/uploads/1/3/4/8/134871884/pawarunevulev-lipisegir-sofajusejofape-ritajaxiwib.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458144/normal_5fd822f02df08.pdfIn PDF document text
    • https://bofujobepoj.weebly.com/uploads/1/3/1/1/131164048/tidevomub.pdfIn PDF document text
    • https://towuzisutodugo.weebly.com/uploads/1/3/0/9/130969847/1142803.pdfIn PDF document text
    • https://pumaxodevuk.weebly.com/uploads/1/3/1/8/131872084/ganezupis.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402940/normal_5fceaccf164eb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451549/normal_6046415ccea7e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zufiwuz.pbworks.com/w/file/fetch/144657393/how_to_root_kali_linux_2020.2.pdfIn PDF document text
    • http://felinemumivu.pbworks.com/w/file/fetch/144583632/cursive_writing_practice_sentences.pdfIn PDF document text
    • http://xafusigivu.pbworks.com/w/file/fetch/144663480/anveshi_jain_app_mod_apk_unlimited_money.pdfIn PDF document text
    • http://bemulopawed.pbworks.com/f/15018018622.pdfIn PDF document text
    • http://tosuvop.pbworks.com/f/latin_american_independence_movements_worksheet_answer_key.pdfIn PDF document text
    • http://xesimisejek.pbworks.com/f/ketajuw.pdfIn PDF document text
    • http://munonoraze.pbworks.com/w/file/fetch/144457506/2013_yamaha_fjr1300_owners_manual.pdfIn PDF document text
    • http://barumena.pbworks.com/w/file/fetch/144462438/equation_differentielle_ordre_1_variable_separable.pdfIn PDF document text
    • http://mujefapufefi.pbworks.com/f/fabevezudeguzilamabutare.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_off00013a81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A81 5564 bytes
SHA-256: 296b8d69297bcdf1ba2a4a0fc1f602a6c9751574baf012522e987c2eb0619de2
font_01_sfnt_off00014d6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14D6E 11212 bytes
SHA-256: 7ab1bbb952604ba5951b9988cca8668c82041fd0e3248619f402bfa96ca85d2e

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