Malicious PDF — malware analysis report

Static analysis result for SHA-256 eedca22b0ccd0ea5…

MALICIOUS

PDF

76.8 KB Created: 2021-02-25 19:08:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 34c0c87816f15da8c6d67d51fec99484 SHA-1: f828ad596e0861e76ea777b351e99cd5139ac48b SHA-256: eedca22b0ccd0ea589318a395b5ddaf957492688e5ea00db4d7f7f17e4a19a61
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The PDF contains numerous embedded URLs, with one prominent URL pointing to a suspicious domain ('maypoin.ru') that is likely part of a phishing or malware distribution scheme. The presence of many distinct hosts and link farm characteristics further supports a malicious purpose.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://maypoin.ru/strik?utm_term=happy+all+souls+day+quotes PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4462046/normal_5fd645d9866ec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405641/normal_601b982d60c3a.pdfIn PDF document text
    • http://jaxagogilexet.sportsontheweb.net/427984491.pdfIn PDF document text
    • http://dewisazovuvoxi.mywebcommunity.org/how_to_type_into_a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dezenaxo.rf.gd/rutavenimesofizowawi.pdfIn PDF document text
    • http://kixixiwibatogit.epizy.com/ios_camera_filter.pdfIn PDF document text
    • http://davidoxikolud.epizy.com/lonulutijegigewageju.pdfIn PDF document text
    • http://velefejaforafe.rf.gd/how_to_describe_someone_sad_face.pdfIn PDF document text
    • http://xuvufajozurez.rf.gd/kavok.pdfIn PDF document text
    • http://minefoz.rf.gd/is_greenworks_a_good_product.pdfIn PDF document text
    • http://gawusozuf.epizy.com/emglo_air_compressor_parts_diagram.pdfIn PDF document text
    • http://faxiruvud.myartsonline.com/interview_questions_and_answers_for_store_manager.pdfIn PDF document text
    • http://fufezexu.epizy.com/68922162616.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_off0000f092.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF092 5044 bytes
SHA-256: 033014d7be421142f286dfe653caf03bce8c9dd11a59d7c623b5eebf22b03e2e
font_01_sfnt_off000101d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101D2 10732 bytes
SHA-256: 5dc2e32780b970fc5be581b29b403a0e77bed4e7ad5c7c59936d1caab0343580

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