Malicious PDF — malware analysis report

Static analysis result for SHA-256 73687e0b59ea6204…

MALICIOUS

PDF

79.9 KB Created: 2021-06-13 13:02:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 7dee35ed64c4e4ef9077c73eee65ef8b SHA-1: ab3cb4b461d839e3e664031943ecb67d3442d546 SHA-256: 73687e0b59ea6204d2797ace5854a42d449f3c0c25f044b862e93c943b1d175b
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://catamma.ru/pbw?utm_term=prey+movie+2007+full+movie PDF link annotation
    • https://sukonusumetuf.weebly.com/uploads/1/3/5/2/135294143/fakiza-gofelago-rewevilu.pdfIn PDF document text
    • https://fukoxifixe.weebly.com/uploads/1/3/4/4/134460993/8397767.pdfIn PDF document text
    • https://dakovogusuzulex.weebly.com/uploads/1/3/4/5/134595229/5480947.pdfIn PDF document text
    • https://mobafowowa.weebly.com/uploads/1/3/3/9/133997459/8303950.pdfIn PDF document text
    • https://juladugalevatib.weebly.com/uploads/1/3/4/3/134385664/eeee3ebdac55.pdfIn PDF document text
    • https://dizakevusarebiz.weebly.com/uploads/1/3/4/5/134581037/batuzukesaxakitegor.pdfIn PDF document text
    • https://dikasawo.weebly.com/uploads/1/3/5/3/135349802/bijok-penejedetule.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367944/normal_5fe077e50249d.pdfIn PDF document text
    • https://xusukimijep.weebly.com/uploads/1/3/2/6/132681495/delapevofom_xatis.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406481/normal_5fd7828096772.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412382/normal_6062f2b215039.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416665/normal_600aef6b407b4.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/a172be1d-131d-4e26-83e1-20f3feb95539/black_and_decker_grass_hog_xp_trimmer_line.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/276d9840-85f3-4df0-b2a8-90c1cdce8e71/microsoft_onenote_2010_training_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/216d0c4a-ae04-45b0-8ad9-0e524fc892af/7529189095.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37bb1aae-f10c-4cb6-ad8d-6122efcb789f/how_to_winterize_a_craftsman_pressure_washer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7452efc-29f7-4f18-9af1-2217334ad3bd/what_is_a_derringer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/085fc587-5c29-4318-93ef-ffc4fd6d5a5c/what_is_english_101a.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d088e318-48c0-4bf9-a8b6-fe28e5a91e2e/original_21_precious_moments_list.pdfIn PDF document text
    • http://xovakovawup.pbworks.com/w/file/fetch/144487350/vision_pro_8000_commercial_installation_manual.pdfIn PDF document text
    • http://katexawa.pbworks.com/w/file/fetch/145217616/nashibvaan_full_movie_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82cc156b-ab2b-44e0-9293-a63f7233afec/what_is_associated_dependent_development.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2d51014-7d91-4ef3-83a8-54d63fcb1b3d/2012_dodge_avenger_sxt_review.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_off0000ef80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF80 4740 bytes
SHA-256: 2227814142f0fa3183155f14c6a214d76cfafa2952006d02556ecd0a73730f1f
font_01_sfnt_off0000ffa3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFA3 10624 bytes
SHA-256: b34481a45949a0c92c9fd161e0025852c8e4c964a85e80d54c038e8964a73931
font_02_sfnt_off00012400.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12400 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34