Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d057e7ac83906ec…

MALICIOUS

PDF

76.2 KB Created: 2021-03-02 18:18:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 5a8420c4e8085df705538148a16efca5 SHA-1: e403e657e6665689ba66904bafe83ee77f1870a0 SHA-256: 5d057e7ac83906ecfedabb9da8df6f91ffb298c9260d3d70d9308b004ebd5074
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious content. It contains numerous external URIs, with one pointing to 'fokemale.ru', suggesting a phishing or malware distribution attempt. The presence of embedded URLs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic further support this, indicating the document is designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://fokemale.ru/strik?utm_term=the+rime+of+the+ancient+mariner+summary+in+urdu PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4455684/normal_5feebc3f798f8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452835/normal_5fff6e3af2a33.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4493602/normal_5ff4c39ea6f9b.pdfIn PDF document text
    • https://monijakuxit.weebly.com/uploads/1/3/4/3/134362478/koretamegopuka_mexaretis_bugaterapovigi.pdfIn PDF document text
    • https://wamogipoko.weebly.com/uploads/1/3/0/7/130739383/131564.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481072/normal_5ff3a2e668b6c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4526930/normal_5feb57189ee09.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421937/normal_60390c9d9d3de.pdfIn PDF document text
    • https://jikizukudelo.weebly.com/uploads/1/3/4/8/134879768/223926.pdfIn PDF document text
    • http://wiinorama.space/84698698745qhteo.pdfIn PDF document text
    • https://tewizoduwab.weebly.com/uploads/1/3/5/3/135341898/wafusesagike.pdfIn PDF document text
    • http://rumurel.mywebcommunity.org/2000_honda_accord_oil_light_flashing.pdfIn PDF document text
    • http://srakan.space/can_god_give_u_moneyl5css.pdfIn PDF document text
    • https://poxosopetijonaj.weebly.com/uploads/1/3/1/4/131453527/sekupuborawariraxi.pdfIn PDF document text
    • http://misstourist.info/acer_aspire_a315-_21_manuallt5xz.pdfIn PDF document text
    • http://copyrighytsupport.com/dadinexumgiq.pdfIn PDF document text
    • http://bosnoslovnoejelaniekupit.xyz/kufunudjkbc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4505326/normal_602b6c54230c3.pdfIn PDF document text
    • http://subfamjtii.site/fasudelaxadodenuf9p7qq.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wenares.myartsonline.com/pixepururakogow.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_off0000eeb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEB7 5280 bytes
SHA-256: 6541cee2e60610d8ea8090751540444504c37385644343315a55ff1eba5df6cf
font_01_sfnt_off00010085.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10085 10356 bytes
SHA-256: f0bdcd920c6dc07a48a61c377a0cd41f0f294c12478338ec6639506e3278c19a

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