Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9ce6e8e019bfe64…

MALICIOUS

PDF

82.4 KB Created: 2021-03-04 15:15:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 95da256fb4e955d579704b577f08d228 SHA-1: 33d3a8edc6ff79881bd02066a9ffff629f8d36e6 SHA-256: f9ce6e8e019bfe64d1d57abbd641844b4242e6595b3269b780b59ecc6e1e97e1
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs pointing to disposable domains and link farms, indicative of a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly suggest malicious intent. The document body, though heavily obfuscated, contains keywords related to a debate tournament, likely serving as a lure to entice users to click on the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://jottigo.ru/wix?keyword=debate+tournament+of+champions+2020 PDF link annotation
    • http://helplnstagram-confirm.com/58716107961k61y4.pdfIn PDF document text
    • http://damvglaz6.xyz/84818460396n9rcc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369493/normal_5fcdd7dab7874.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491934/normal_601f1946cfee2.pdfIn PDF document text
    • http://legionmone.xyz/xitipujalawuwelovofusapcnh.pdfIn PDF document text
    • https://revafabeku.weebly.com/uploads/1/3/4/7/134708131/4041154.pdfIn PDF document text
    • http://neuroncraft.online/bosozapaxibajixk9dr.pdfIn PDF document text
    • http://brumbum2.xyz/5661234473ub2ti.pdfIn PDF document text
    • http://oneitshop.pro/reflexive_pronouns_worksheet_grade_10wlhg9.pdfIn PDF document text
    • https://fitisasituwag.weebly.com/uploads/1/3/4/8/134846324/1643090.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373999/normal_5fd81b4b54428.pdfIn PDF document text
    • http://cosmostil.top/dry_ice_blasting_machine_for_saleob8fh.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4492529/normal_5fc9425594a2d.pdfIn PDF document text
    • https://cdn.sqhk.co/fatidizeru/0j3JgcX/56472195468.pdfIn PDF document text
    • https://cdn.sqhk.co/bepemuno/ghNjaih/73605571480.pdfIn PDF document text
    • https://cdn.sqhk.co/mezutorixo/jhdarih/retro_pc_games_for_sale.pdfIn PDF document text
    • http://batut.space/pidarigiecn0.pdfIn PDF document text
    • https://cdn.sqhk.co/zejewade/1jghphg/didier_raoult_livre_gratuit.pdfIn PDF document text
    • https://wepesinojaru.weebly.com/uploads/1/3/2/3/132303052/d6d6c82.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/841abcc9-e25c-4a34-ae20-976b745165de/how_to_self_clean_my_wolf_oven.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/77bb6121-05ac-47ca-823a-4519767d5a82/suwawowasupejufuserewo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b35076ef-f902-4759-8eaa-6f67bc7f335f/78295992928.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6ea50c5-439f-45c8-9605-bf1b34fbfe74/m11_autoclave_instructions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7249451b-b16b-4491-8a1d-4c16457b6988/when_you_find_me_characters.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_off000102d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102D6 5636 bytes
SHA-256: 20e5b8328d5addb5afe1c5817d23d1fccae7253d294892d888301e3ae04423c5
font_01_sfnt_off000115df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115DF 11776 bytes
SHA-256: b0ecf5c86bb0df0166f7e27bf061784e42f6abf8644c01ac063449fdaf080f64

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