Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ff29af9a6f10999…

MALICIOUS

PDF

77.0 KB Created: 2021-05-25 03:06:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: c4c4417251919f1c323c9d1b5c6f7783 SHA-1: d0fb37e301da1ccd8a5c3950f2271488760534f3 SHA-256: 2ff29af9a6f109994c89d26f8486b88f03f8f40b53dc93ff82583657f835f8d3
186 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing lure. The document body, though heavily garbled, contains text related to photo recovery, which is likely a pretext to encourage users to click the embedded links. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://jottigo.ru/strik?utm_term=is+there+a+way+to+restore+permanently+deleted+photos+on+android PDF link annotation
    • https://doruxajowivabog.weebly.com/uploads/1/3/4/8/134870444/tidajobuwisumukatuz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468286/normal_600ff84f78d1d.pdfIn PDF document text
    • https://mulodetudujidof.weebly.com/uploads/1/3/5/3/135325190/topopajoges.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476577/normal_602bfb347704c.pdfIn PDF document text
    • https://voledepegos.weebly.com/uploads/1/3/1/4/131407008/6d8f3bbd1f2a.pdfIn PDF document text
    • https://duxoberadu.weebly.com/uploads/1/3/4/7/134718286/2829333.pdfIn PDF document text
    • https://durosokikiw.weebly.com/uploads/1/3/1/3/131379956/efc3df.pdfIn PDF document text
    • https://dofazodasi.weebly.com/uploads/1/3/0/8/130873943/karebota.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447912/normal_60610cf1d401e.pdfIn PDF document text
    • https://rudarizegofuk.weebly.com/uploads/1/3/4/3/134355262/fojawetatawek.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453906/normal_60437af4451f1.pdfIn PDF document text
    • https://wodumipanopova.weebly.com/uploads/1/3/4/7/134731655/mibogidok_lafozax_minuwomig_vedunezaru.pdfIn PDF document text
    • https://pusazaninad.weebly.com/uploads/1/3/4/3/134358808/wakisete.pdfIn PDF document text
    • https://fufilotaniwa.weebly.com/uploads/1/3/5/3/135321354/539d9a3729dd08.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482625/normal_602a1ac45e9f6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426407/normal_5feec45bd482f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444092/normal_5ffe47074d7e3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474456/normal_5fd03fdd363ae.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414701/normal_5fef78bbb606e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/e605a462-c101-484e-8605-99d6f9e430f1/la_divina_comedia_el_infierno_resumen_corto.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b753aa8f-160c-427f-83c6-943a48e2bd01/how_to_put_calculator_in_degree_mode_casio_fx-991ex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8977242f-8670-4a71-aaf8-8d1743124e3b/what_to_do_when_your_hp_laptop_says_preparing_automatic_repair.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/993bf2c4-22b9-4823-b2e3-77cbd81a21f7/36550909962.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3377ca07-98ae-474d-b3ea-4168aa8bf847/ruvovabiruvozam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a64d160-083c-41df-8e71-ac653edede32/how_to_rotate_a_document_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ed3a314-a352-4f68-a960-d3b0fb4bfe90/jekorozekurebebolikof.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_off0000eec5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEC5 5332 bytes
SHA-256: 5eb4b53f8f59162dd53c5b78fd8eddc1c99388ec21dcfff274053634374abfdb
font_01_sfnt_off000100cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100CF 10716 bytes
SHA-256: c5a89cd73b9d5c3d02541905e0f222fbf7ff2c8af7b46dce40196237e80c9837