Malicious PDF — malware analysis report

Static analysis result for SHA-256 84ac62bc729f814a…

MALICIOUS

PDF

91.8 KB Created: 2021-06-09 16:10:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 0fe829a41d2e0487e1aa864bea529202 SHA-1: 32f32fb18b2bf94a626111f706ac1a18089f98aa SHA-256: 84ac62bc729f814a1365affb0f2ecf46688dab1d4e4dccdb54f82e25b3e17354
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing or trojan. The document body, though heavily obfuscated, contains references to 'shayne ward breathless mp3 free download', suggesting a lure. The embedded URLs, particularly the one on 'crysiq.ru', are likely part of a link farm designed to redirect users to malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 5

  • 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://crysiq.ru/pbw?utm_term=shayne+ward+breathless+mp3+free+download PDF link annotation
    • https://lutilizifaguno.weebly.com/uploads/1/3/5/3/135316604/0c8858cd9ced603.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375352/normal_6000d2b90cbca.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460045/normal_5fef633bf277c.pdfIn PDF document text
    • https://nazisedisan.weebly.com/uploads/1/3/1/8/131871674/zulidibuxaduli.pdfIn PDF document text
    • https://zuzowasef.weebly.com/uploads/1/3/4/3/134351381/846de4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454180/normal_6048c48b76503.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388420/normal_5fefc18597e3d.pdfIn PDF document text
    • https://mezovojexojija.weebly.com/uploads/1/3/0/8/130874002/mizetupik.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414848/normal_6014484ea8cce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419423/normal_6031bc571bbd0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385850/normal_605aeceedea44.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403820/normal_605d2fca2b5ba.pdfIn PDF document text
    • https://witaretazijaw.weebly.com/uploads/1/3/0/8/130813730/2598404.pdfIn PDF document text
    • https://lumejukotexute.weebly.com/uploads/1/3/1/1/131163930/b263340.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://biselafibe.pbworks.com/f/75133043867.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f644086-34f3-42e4-96ce-c5e9acd92285/4251815236.pdfIn PDF document text
    • http://dejulagimu.pbworks.com/w/file/fetch/144565266/wisuwu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b8cd64e-0040-4d58-b92a-43e78d94a489/79980988815.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65d679aa-0bd1-4ea4-b14e-be995a213795/stihl_garden_vac_bag.pdfIn PDF document text
    • http://kigemulu.pbworks.com/w/file/fetch/144569877/how_to_breed_rhynex_in_monster_legends_wiki.pdfIn PDF document text
    • http://mibegenav.pbworks.com/f/fundamentals_of_human_resource_management_5th_edition_free_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd614a8e-fd82-4eef-a067-1acae927e810/pride_and_prejudice_2005_movie_facts.pdfIn PDF document text
    • http://ronefete.pbworks.com/f/what_is_the_difference_between_interpretivism_and_positivism.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00013ef6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x13EF6 20392 bytes
SHA-256: 890df752d9813cc7f3e049a4939ecae08ef236da229da5931179fd50d17d84f2
font_00_sfnt_off0000ee7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE7B 5880 bytes
SHA-256: 9f26899983a8d47549c43540c3bc1095c66901678386468093558439a4cdbc8f
font_01_sfnt_off00010261.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10261 2672 bytes
SHA-256: c1248d74d697297a51c1d6431d67454e6d7e84a5c7bf8a9f56fb8bb13dfaa6a5
font_02_sfnt_off00010d68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D68 20000 bytes
SHA-256: edb9664ad3a17ffb057e20f1b6c5dd16338659f9ec05562290f29cad010e0410