Malicious PDF — malware analysis report

Static analysis result for SHA-256 194c90e6927a774b…

MALICIOUS

PDF

78.3 KB Created: 2021-05-28 08:08:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 68db7f000cfd85b34872e1f6cc92c3b5 SHA-1: e86b179acd2db8ededf067576ab0bf69ff9a2f9e SHA-256: 194c90e6927a774bdb57c6343f51073b35ca0d71e75a8c33453cff91e8b34f61
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 operation. The primary URL, 'https://fokemale.ru/strik?utm_term=which+is+the+best+site+to+download+tamil+movies', is presented as a search result, aiming to trick users into clicking through to a potentially malicious site. The ClamAV detection and ML classifier further support its malicious nature, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://fokemale.ru/strik?utm_term=which+is+the+best+site+to+download+tamil+movies PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4409614/normal_60344ba56e1ff.pdfIn PDF document text
    • https://bigubuwona.weebly.com/uploads/1/3/4/3/134309174/fenexuvukifuxagor.pdfIn PDF document text
    • https://ropababiw.weebly.com/uploads/1/3/4/6/134667017/fifaduzifenof-lurijopen.pdfIn PDF document text
    • https://kiwotatuna.weebly.com/uploads/1/3/1/8/131856308/173d150b496414.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489975/normal_6062abd4cf5db.pdfIn PDF document text
    • https://tujelogujonugi.weebly.com/uploads/1/3/4/4/134491942/9c486defd.pdfIn PDF document text
    • https://xatuguje.weebly.com/uploads/1/3/1/8/131856293/wejij.pdfIn PDF document text
    • https://xoxebugifujame.weebly.com/uploads/1/3/4/4/134478015/venefadut-xawesuzogazuvof-fubekikodimi-diturijere.pdfIn PDF document text
    • https://ronukeva.weebly.com/uploads/1/3/5/3/135385202/guwozugexiboseru.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406223/normal_5fd85b5ae285e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4502493/normal_5ff138fd1c8fd.pdfIn PDF document text
    • https://dexugagemer.weebly.com/uploads/1/3/4/7/134715037/gudesosogakanu_peditazimot_xirali_sanoziluxeli.pdfIn PDF document text
    • https://lufetanajimub.weebly.com/uploads/1/3/4/5/134592974/7826141.pdfIn PDF document text
    • https://sanegirorasatu.weebly.com/uploads/1/3/5/4/135400744/zepazenugole.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410952/normal_5ffe5fbec76bc.pdfIn PDF document text
    • https://botekajerojaj.weebly.com/uploads/1/3/4/7/134749353/4723607.pdfIn PDF document text
    • https://duzopotubesafes.weebly.com/uploads/1/3/4/8/134890215/4225167.pdfIn PDF document text
    • https://vilegewadaw.weebly.com/uploads/1/3/5/3/135324537/2eaabc70ce.pdfIn PDF document text
    • https://jixejuterekafiw.weebly.com/uploads/1/3/4/5/134508928/1286914.pdfIn PDF document text
    • https://gebipobewixaduk.weebly.com/uploads/1/3/4/6/134631326/lipamudiruduradin.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/2c98fb4a-5641-48e7-8381-512ce5fd67ae/vegukexedidemolam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b0aac14-1790-48d6-8a53-ae37e53ff04d/79658200756.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6471482e-096f-4399-ba68-523b8021ac0c/64039806233.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02801b32-8daf-4fad-ba70-c65ce132356e/fenixotuzudasal.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_off0000f495.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF495 5388 bytes
SHA-256: c74699eb81365729bfafdf699ed7e99e6af727821dcc27db3cc029e2a2a04e19
font_01_sfnt_off000106e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106E2 10720 bytes
SHA-256: d889bda4e02c255bc4e618240683e1e9b680cdeaf93812ce738bad1537ff386f