Malicious PDF — malware analysis report

Static analysis result for SHA-256 17f3fdb860386c43…

MALICIOUS

PDF

70.4 KB Created: 2021-04-08 07:45:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 55fa890bc9ba7a35d45c14465c29031a SHA-1: 8f650a504429ecfc5536099be583f32e34b3b11a SHA-256: 17f3fdb860386c439e08ab7487128285edd79fc1e510da5cbfcdeb52da09776a
186 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains a large number of external links, many hosted on disposable domains, indicating a link farm. The document body, though heavily obfuscated, contains references to 'Ct channel 3 news reporters' and the authoring application 'wkhtmltopdf', suggesting a lure to a deceptive website. The presence of numerous external URIs points towards an attempt to redirect users to potentially malicious content or advertising networks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://lozipotod.ru/123?utm_term=ct+channel+3+news+reporters PDF link annotation
    • https://migigagabigugam.weebly.com/uploads/1/3/0/7/130775968/9068950.pdfIn PDF document text
    • https://xazupegenam.weebly.com/uploads/1/3/2/6/132695472/vunekedajefapaw.pdfIn PDF document text
    • http://jumoralidanog.22web.org/kisize.pdfIn PDF document text
    • https://pisekubil.weebly.com/uploads/1/3/4/3/134322001/vufomutelavuxad_julazodazamige.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4498978/normal_5ffe851accd3b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418379/normal_5fcf693651fc7.pdfIn PDF document text
    • https://jigibomafife.weebly.com/uploads/1/3/0/7/130738667/3afaedfbe.pdfIn PDF document text
    • https://niburisugop.weebly.com/uploads/1/3/6/0/136082965/lebemitisejos_litididuvo_mufawuzulesite.pdfIn PDF document text
    • https://lokapane.weebly.com/uploads/1/3/4/4/134464640/vewavitinale.pdfIn PDF document text
    • http://padesuwajawal.22web.org/baldur_s_gate_strategy_guide_download.pdfIn PDF document text
    • https://mogalarozo.weebly.com/uploads/1/3/5/9/135968713/72c5f4aea0e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484103/normal_5fca93705c0c3.pdfIn PDF document text
    • https://nowebapimigofok.weebly.com/uploads/1/3/4/3/134338607/11df5366ea3f.pdfIn PDF document text
    • https://vebavorosufate.weebly.com/uploads/1/3/4/7/134742301/3931403.pdfIn PDF document text
    • https://zukodefikarux.weebly.com/uploads/1/3/4/4/134498552/8d00c398f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417999/normal_6009f599d585b.pdfIn PDF document text
    • https://dolopexoje.weebly.com/uploads/1/3/1/8/131872138/tanenenat.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://s3.amazonaws.com/wazagidonux/26408399671.pdfIn PDF document text
    • http://nejoluf.epizy.com/zepunilijaguzuvonubifupos.pdfIn PDF document text
    • https://s3.amazonaws.com/zewimu/5900472230.pdfIn PDF document text
    • http://zefuxaninegug.epizy.com/beaver_scouts_in_france_uniform.pdfIn PDF document text
    • http://pidusuzelaju.epizy.com/rezaxipawelukovo.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_off0000cb32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB32 5040 bytes
SHA-256: 790cc4c7816c943e62d7eb55829ac0b2824f36616d7e8baf2ddb69eb5e88e381
font_01_sfnt_off0000dc4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC4E 9876 bytes
SHA-256: 2a86eeede038234257235500c1de7d933464c6a5f4f3dd8be9fc3dfc30e8ffa8
font_02_sfnt_off0000fe29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE29 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176