Malicious PDF — malware analysis report

Static analysis result for SHA-256 00ab9c49046bf31d…

MALICIOUS

PDF

75.3 KB Created: 2021-06-01 10:57:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 070cfcc98d8fef1d238e2a73f308049f SHA-1: c29a51379fc5bde9b12c9866dde59dfb98622f95 SHA-256: 00ab9c49046bf31d82a7ff94541736d4bfb15600d66afdaa784696af0c37f62d
186 Risk Score

Malware Insights

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

This PDF file is identified as malicious by multiple heuristics and a machine learning classifier, with ClamAV detecting it as a phishing trojan. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to distribute malicious content or conduct phishing. The presence of embedded URLs and the overall structure strongly indicate a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • 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.
  • 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://xezojetit.ru/123?utm_term=xfinity+app+on+xbox+one
    • https://mifanupomiseri.weebly.com/uploads/1/3/2/6/132681757/cef61c8a.pdf
    • https://cdn-cms.f-static.net/uploads/4379355/normal_604d4821b3be7.pdf
    • https://rixotojar.weebly.com/uploads/1/3/0/9/130969533/fugevakozeriluxa.pdf
    • https://sasinulipig.weebly.com/uploads/1/3/7/5/137512958/xefemute-dimiwudefi-gixuse.pdf
    • https://rebifigu.weebly.com/uploads/1/3/4/6/134663288/4897114.pdf
    • https://suranekiwexem.weebly.com/uploads/1/3/4/6/134698667/zabul.pdf
    • https://sijotifibiga.weebly.com/uploads/1/3/0/9/130969940/waxutewepavav.pdf
    • https://sisubovutajad.weebly.com/uploads/1/3/4/7/134723402/8742112.pdf
    • https://misekijenag.weebly.com/uploads/1/3/1/3/131380320/a55715df8.pdf
    • https://moluzepin.weebly.com/uploads/1/3/1/8/131856103/lomiz.pdf
    • https://jivarogogujuno.weebly.com/uploads/1/3/4/5/134513891/1038333.pdf
    • https://mubelumovetofap.weebly.com/uploads/1/3/1/8/131856402/tibumubazapix.pdf
    • https://static.s123-cdn-static.com/uploads/4496592/normal_6006b38ccd113.pdf
    • https://cdn-cms.f-static.net/uploads/4416125/normal_6011b858c78a9.pdf
    • https://cdn-cms.f-static.net/uploads/4413231/normal_60309ad777e2c.pdf
    • https://static.s123-cdn-static-d.com/uploads/4402740/normal_60b492e71185f.pdf
    • https://xovamiwif.weebly.com/uploads/1/3/4/0/134096018/desifutu-zusutowulu-vomoti.pdf
    • https://novizatedorik.weebly.com/uploads/1/3/6/0/136095988/giwariwiji.pdf
    • https://gusupaserilobe.weebly.com/uploads/1/3/5/3/135312632/rolafawi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/4ebbdb0b-77fa-4d77-844f-8d9840ddec3c/kenmore_400_dryer_parts.pdf
    • https://uploads.strikinglycdn.com/files/ae15f78c-34e8-428b-b8a0-a61610c700d3/how_to_read_everstart_battery_charger.pdf
    • https://uploads.strikinglycdn.com/files/079800a3-2a37-4a8d-9863-71be122dc4a7/91563922810.pdf
    • https://uploads.strikinglycdn.com/files/506a44b1-092c-493f-9ad5-6a9630d1d253/wagner_procoat_instructions.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e9a5.bin
86a6f8d4f7ae7ecec20b5a28298778dd2a1e6772d4ac280a3322db018b7ebe39		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE9A5 4876 bytes
font_01_sfnt_off0000fa60.bin
8f9b4df40490a2fe57e8b23546818ff6f7358b40b4c7135b9c81f8e7e6c8d410		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFA60 11092 bytes

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