Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d277657836bea19…

MALICIOUS

PDF

75.7 KB Created: 2021-03-20 22:05:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: e666db069fb42d6f00b44be31be42a04 SHA-1: 1f58d0cf558fd8971946087c3763b0e94a2fd0cf SHA-256: 3d277657836bea190f3450379e0fe590f1cd56f3ca51be65111868e2cdf9c14f
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, many hosted on disposable domains, suggesting it functions as a link farm to distribute malicious content or phish for information. The presence of 'utm_term' parameters in some URLs further supports a campaign-like distribution strategy.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://zajinet.ru/strik?utm_term=evenflo+symphony+lx+car+seat PDF link annotation
    • https://gizalikujaxemif.weebly.com/uploads/1/3/4/6/134606641/jobinopasada.pdfIn PDF document text
    • http://rabiwitijif.medianewsonline.com/smartphone_addiction_scale.pdfIn PDF document text
    • https://japutiluzot.weebly.com/uploads/1/3/5/9/135991977/05ded2af.pdfIn PDF document text
    • https://cdn.sqhk.co/pawosuku/hhNifjf/obs_stream_deck_plugin.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457008/normal_5fce084133d35.pdfIn PDF document text
    • https://jelimofinumalo.weebly.com/uploads/1/3/4/6/134669039/7169931.pdfIn PDF document text
    • https://rinadulig.weebly.com/uploads/1/3/0/7/130739308/bupogegejo.pdfIn PDF document text
    • http://buwovavozu.getenjoyment.net/undoing_yourself_with_energized_meditation.pdfIn PDF document text
    • https://todegebonuvakef.weebly.com/uploads/1/3/1/6/131606144/bawawuzuxefag-mijumos.pdfIn PDF document text
    • https://zogazipo.weebly.com/uploads/1/3/2/3/132303407/bemigav-xowupeje-kunat-wifezonosi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420039/normal_601fb599aef03.pdfIn PDF document text
    • https://koponabunabo.weebly.com/uploads/1/3/4/5/134520941/9823656.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4466143/normal_5fe25641c8cac.pdfIn PDF document text
    • https://cdn.sqhk.co/jinubodilev/gs9igbG/ghetto_wallpapers_download.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://57eba762-b826-4879-8d7a-7f480aba2934.filesusr.com/ugd/e89c2b_2f05a021cf4c43e296e27323291de6b5.pdf?index=trueIn PDF document text
    • https://5e9816b5-e261-4a84-a5c7-594b6999e1c8.filesusr.com/ugd/eb2f7d_dc31172b178a46489bc97dc7667db50e.pdf?index=trueIn PDF document text
    • https://85ed388a-52e0-4e79-9737-9d4b769dda71.filesusr.com/ugd/bb10c5_eeeb7d129052421fada282ec3115a2c8.pdf?index=trueIn PDF document text
    • https://33fe1336-4051-433c-b691-b763732126dd.filesusr.com/ugd/6c8f37_7d3614ad50c143e9b679b51336f6f75f.pdf?index=trueIn PDF document text
    • https://d8d691c7-cf48-432b-bece-a54604b57851.filesusr.com/ugd/1e3a4b_d2918064bab64df3aa4ca04189545665.pdf?index=trueIn 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_off0000e581.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE581 5444 bytes
SHA-256: d717bbc00f7bae90d16314509fb5610e59dc1bc761d4dfddd2791bf4f0970a78
font_01_sfnt_off0000f7f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7F6 12364 bytes
SHA-256: 8c325344b6586d615f599fc9b2eb92575723dec1d224c609b638ebaa276c8d78

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