Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9c2062c6c97925b…

MALICIOUS

PDF

78.6 KB Created: 2021-03-27 23:29:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 7b2c4d0d5c3b2f015e5f4d0eb8e66a21 SHA-1: fba654500cd9dafb0129be44e29ab8603a21795a SHA-256: e9c2062c6c97925b4f1cfb7cc0e67d5f16086b1f025c830de486fe72c4a68ed0
126 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm or phishing lure. The presence of PDF-specific heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports 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://nipisod.ru/award?keyword=blank+december+2020+calendar+printable+pdf PDF link annotation
    • http://wajazenizur.mywebcommunity.org/stop_printer_printing_test_page_every_time.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370777/normal_6021ceffea566.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494451/normal_5ff0dab21ef08.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414688/normal_60298f4282683.pdfIn PDF document text
    • http://vanlit.ru/30752095566yhkc3.pdfIn PDF document text
    • http://cetakchantek.com/como_hacer_una_ficha_bibliografica_para_un_libro5daze.pdfIn PDF document text
    • https://cdn.sqhk.co/zidulibu/iiTiagh/paloviduvo.pdfIn PDF document text
    • http://tulomodev.getenjoyment.net/sentry_safe_keypad_instructions.pdfIn PDF document text
    • http://fazejajogavu.medianewsonline.com/zisivobizodewazaru.pdfIn PDF document text
    • https://cdn.sqhk.co/sudidoxa/wvig26p/56855476893.pdfIn PDF document text
    • https://cdn.sqhk.co/lisupixiwe/cqgeVhg/sitasevu.pdfIn PDF document text
    • https://cdn.sqhk.co/kolusugego/SjcszoM/50148376067.pdfIn PDF document text
    • http://begdas.space/rilafakirunelukexijewobizjcbck.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/23a81520-f453-4383-b998-c20d7e54f4d1/85955292249.pdfIn PDF document text
    • http://fuvuvadut.onlinewebshop.net/19710000866.pdfIn PDF document text
    • http://fovawipemezipu.myartsonline.com/74765517690.pdfIn PDF document text
    • https://e028ba52-6c86-493e-86b7-fecf7cd1c3eb.filesusr.com/ugd/bcb9fd_5f29607f790a40ea8a9aa7c6f84ebf9a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e9b28a0-3db4-42f1-9930-2719fb57c3b1/zondervan_compact_bible_dictionary.pdfIn PDF document text
    • https://b7af6bb9-01eb-4839-ab56-764651de4344.filesusr.com/ugd/2486b5_5df715c4312b4402ab94436a0aa71b76.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8889c19-91d6-4833-98f5-edae697b2da3/vitowugupuzaj.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA45 5328 bytes
SHA-256: 65f60e95bc79c7407ec0026abb457f4f050908c1d8791af3ba6af27b6e658fe2
font_01_sfnt_off0000fc3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC3E 10020 bytes
SHA-256: 7db143bfbfefeffb606ad62eb64fb0d2d9c3cb0a825f4095a8c7b1667c6ed2dc
font_02_sfnt_off00011e76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E76 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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