Malicious PDF — malware analysis report

Static analysis result for SHA-256 24b64c35fcb65d48…

MALICIOUS

PDF

88.6 KB Created: 2021-01-13 15:10:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 467b21f9979cb7de344ab2fc740315ba SHA-1: 99e1c4e066d5d9825967f5dc4307c06aae0ef691 SHA-256: 24b64c35fcb65d48be556fcc70aaa1425035cc42005e2787f250285d14f4f5a0
156 Risk Score

Malware Insights

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

The PDF contains heuristics indicating it is part of a link farm and has been flagged by ML classifiers and ClamAV as malicious. It embeds external URIs, including one pointing to 'traffset.ru', which is likely a malicious landing page. The PDF's structure and embedded content suggest it's designed to redirect users to potentially harmful websites, possibly for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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 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.
  • 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://traffset.ru/wb?keyword=laser%20cutting%203d%20model PDF link annotation
    • https://kifesajisibak.weebly.com/uploads/1/3/4/8/134884742/viluvobigimegum_samaxurato.pdfIn PDF document text
    • https://jewotefajasofu.weebly.com/uploads/1/3/2/7/132741420/55a3d2b58e3.pdfIn PDF document text
    • https://cdn.sqhk.co/muzorefu/if2jcgf/first_australian_rugby_league_captain_in_1908.pdfIn PDF document text
    • https://cdn.sqhk.co/dosakupu/fmhgjaT/legend_of_solgard_underworld_guide.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/tibitexil/apex_legends_aimbot_free.pdfIn PDF document text
    • https://s3.amazonaws.com/zamuriza/platformer_game_background_music.pdfIn PDF document text
    • https://s3.amazonaws.com/lumixi/format_0._00_0._00.pdfIn PDF document text
    • https://s3.amazonaws.com/sodoxi/inuyasha_a_feudal_fairy_tale_manga.pdfIn PDF document text
    • https://s3.amazonaws.com/nedijowewoded/tavak.pdfIn PDF document text
    • https://s3.amazonaws.com/jinabisura/segutoziwuxodinowiz.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/caste_certificate_form_in_hindi.pdfIn PDF document text
    • https://s3.amazonaws.com/jesidofefe/the_death_cure_chapter_10_summary.pdfIn PDF document text
    • https://s3.amazonaws.com/takebemanijewok/js-_xlsx_json_to_sheet_example.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000effa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFFA 3440 bytes
SHA-256: 612cb28e98d372f8e22ef1cd298de17a26975d61c11dff5034cfd601208dae9e
font_01_sfnt_off0000fc39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC39 5248 bytes
SHA-256: 7b95ae4b540b92442c0e03aa77f2152ee6bd29b8e7a27574d58a2edc980385a4
font_02_sfnt_off00010de6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DE6 4072 bytes
SHA-256: cc45c2ec1f660f3b48f77f31577b270b4080e5fa16fbcdfbba1810ed196cae02
font_03_sfnt_off00011d1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D1A 13224 bytes
SHA-256: d368f5ab8fe8fc1ab97c6d228b07ae0ce108d5cdc4b9ec75452fcf18035d5dc4
font_04_sfnt_off000146d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x146D6 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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