Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c770fa2a4cd2f26…

MALICIOUS

PDF

82.0 KB Created: 2021-03-19 21:12:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: bd2493ff60164af9b6391259a5d15c83 SHA-1: 12ff9916931bc9071a0c32a22a662a720c5bd57a SHA-256: 2c770fa2a4cd2f261126afe916fd029d6b1034d21bfd7ae5780727f73c2f649f
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://mezovuduw.ru/award?keyword=posthuman+knowledge+pdf PDF link annotation
    • https://jadotonevuwupu.weebly.com/uploads/1/3/1/4/131407011/xipusejijime.pdfIn PDF document text
    • https://nerolokem.weebly.com/uploads/1/3/5/3/135326062/kobugo_fatire_vuwugakegu_wavezelizoj.pdfIn PDF document text
    • https://zuseluxutiv.weebly.com/uploads/1/3/4/6/134686448/6589025.pdfIn PDF document text
    • https://bozelisu.weebly.com/uploads/1/3/2/6/132695328/3598065.pdfIn PDF document text
    • https://fifimijo.weebly.com/uploads/1/3/4/7/134748793/mafazogarilaj-napuwaguxe.pdfIn PDF document text
    • https://cdn.sqhk.co/jurugaguvedu/CgjbZ8x/introduction_to_game_development_coursera_github.pdfIn PDF document text
    • https://jikizukudelo.weebly.com/uploads/1/3/4/8/134879768/73c2572d.pdfIn PDF document text
    • https://nuxajitavira.weebly.com/uploads/1/3/1/8/131871558/e9b08b90629daf9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455195/normal_5fdaac341ef80.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470220/normal_6018e15c55497.pdfIn PDF document text
    • https://cdn.sqhk.co/vekepafate/Agjjfjj/fefejug.pdfIn PDF document text
    • https://setuwome.weebly.com/uploads/1/3/0/8/130874340/jawomigovuf_netula_zebaxebixanitu_batulokuloris.pdfIn PDF document text
    • https://tiforunu.weebly.com/uploads/1/3/1/4/131437018/pudiro.pdfIn PDF document text
    • https://cdn.sqhk.co/wavagowew/sibhBgc/airport_scanner_game_walkthrough.pdfIn PDF document text
    • https://bawufavipefal.weebly.com/uploads/1/3/0/7/130740211/d7d2aa5876b8fe.pdfIn PDF document text
    • https://buzijivugaza.weebly.com/uploads/1/3/4/7/134709386/sopew_xerelu.pdfIn PDF document text
    • https://guzezetuxavipub.weebly.com/uploads/1/3/4/7/134765233/fc8d8ab4297d.pdfIn PDF document text
    • https://jewelilug.weebly.com/uploads/1/3/4/3/134331877/taxuge.pdfIn PDF document text
    • https://jilukixewe.weebly.com/uploads/1/3/4/0/134042659/5d444361d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/juzewojavomofew/19214640222.pdfIn PDF document text
    • https://s3.amazonaws.com/nefomojuwet/augmented_reality_report_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/tubukeganuji/kezamebolasawilase.pdfIn PDF document text
    • https://s3.amazonaws.com/dukajevo/47081654590.pdfIn PDF document text
    • https://s3.amazonaws.com/gogunabones/72356716253.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_off0001023a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1023A 5516 bytes
SHA-256: 0ce0392265e3025592840e524325f9bc5e0227a63d8f5d99ae061d8acd88b829
font_01_sfnt_off000114ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114ED 10972 bytes
SHA-256: efe4858a3185b106ccbcb954d5b6afbd589ac686a8690e4d92b982642adfc1dc