Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8f330ea61d03abd…

MALICIOUS

PDF

108.9 KB Created: 2021-05-28 22:18:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: cb69c5709e11809759c78ee998f558c4 SHA-1: 1f81bc1ab7f06beb3532043580f06679279edbfb SHA-256: d8f330ea61d03abd2593bc80ed6a5593c733290ed2105aa8c7f056da7a716c1f
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many hosted on disposable domains, suggesting a link farm or phishing campaign. The 'ML_NYX_PDF_MALICIOUS' and 'CLAMAV_DETECTION' heuristics strongly indicate malicious intent, with ClamAV identifying it as 'Pdf.Phishing.Trojan'. The embedded URLs, such as 'https://ponafet.ru/strik?utm_term=pokemon+ash+betrayed+champion+fanfiction+harem', are likely used to redirect users to malicious sites, potentially for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://ponafet.ru/strik?utm_term=pokemon+ash+betrayed+champion+fanfiction+harem PDF link annotation
    • https://zezebeburopixem.weebly.com/uploads/1/3/5/3/135326834/13ea9376b88f3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368953/normal_6045103f41cb9.pdfIn PDF document text
    • https://taxajadotediru.weebly.com/uploads/1/3/0/8/130873824/kiwutudafupop-rosopafepaturo-kogowan-funotin.pdfIn PDF document text
    • https://lisiladojorinin.weebly.com/uploads/1/3/0/8/130874519/nuzijesidob-bikus-dubawakodezafa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456985/normal_603e34cd3ff88.pdfIn PDF document text
    • https://pasezarovatif.weebly.com/uploads/1/3/4/8/134858127/wepawe_teruba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401971/normal_602bda951dc11.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407331/normal_5fdaaa0856e2f.pdfIn PDF document text
    • https://batigagonu.weebly.com/uploads/1/3/4/7/134774980/4eb750e3b0bb6a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457572/normal_5ff84b0e9f6cf.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/8281762c-bbc9-46ca-9951-4feaa3b83211/504467339.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/90cbe815-6b3e-4f31-aa30-20d9d9b1a483/9570459055.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b375a49-11a0-46d9-89be-121a693672f1/renetebewapolopalexebi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76627c2e-99af-4536-bc2c-85a8761dd79c/troy_bilt_pony_battery_size.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/171c38f6-7c8e-46ca-b035-f3439d6bcbbf/download_need_for_speed_most_wanted_apk_mod_money.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e566eb7-8299-4946-b233-36a4b04cfad6/why_is_the_art_of_mastering_nonverbal_communication_important_brainly.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2df26faf-1193-44e2-a5ff-8b0bcba3f77a/rabimas.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_off00016d66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16D66 5672 bytes
SHA-256: d416daabdd356b3a3f352e3cc4d8e8384a5efc9105fc5a3c2689cd8a226c2416
font_01_sfnt_off0001808f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1808F 10812 bytes
SHA-256: 27ede33b93a6d8942b641f38d7e0c2d2b86da803e8078a778fcc8da43c4e229d