Malicious PDF — malware analysis report

Static analysis result for SHA-256 43f5446c649cf679…

MALICIOUS

PDF

84.1 KB Created: 2021-06-07 08:29:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 9065ffc831ea854bdfa81c8100c6b020 SHA-1: f4d9cf04fae091259307f7a5d49a98226acc65ea SHA-256: 43f5446c649cf679885b0e0bc06966a12808b99b46816e61b75758c0fa603507
186 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, many pointing to disposable hosting services, suggesting a link farm or phishing operation. The document body text mentions 'Dbz bio android name generator', which is likely a lure to entice users to click on the embedded links. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or spam distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://drafthe.ru/pbw?utm_term=dbz+bio+android+name+generator PDF link annotation
    • https://monivewuvafa.weebly.com/uploads/1/3/4/0/134096064/walosi_duzupe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494661/normal_60273d55850ba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490377/normal_5fd76ae32ba10.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378623/normal_6010f09d73d90.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446647/normal_600b541db1e17.pdfIn PDF document text
    • https://dofebafedu.weebly.com/uploads/1/3/4/5/134588227/talebawutu-nexifixaden-suseg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376359/normal_602fc98795735.pdfIn PDF document text
    • https://sapixokevabose.weebly.com/uploads/1/3/4/4/134498139/nidew_dixisezuzajak_sarirot_sisukevonim.pdfIn PDF document text
    • https://vanevuzitikuge.weebly.com/uploads/1/3/4/5/134588875/mijigegupobizep.pdfIn PDF document text
    • https://metulomoponi.weebly.com/uploads/1/3/4/4/134498565/3568190.pdfIn PDF document text
    • https://ninadagonalot.weebly.com/uploads/1/3/4/6/134668818/07da9d9d2.pdfIn PDF document text
    • https://bilewazivabo.weebly.com/uploads/1/3/2/8/132816117/2126022.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ronakiko.pbworks.com/w/file/fetch/144542346/suwujub.pdfIn PDF document text
    • http://vowijeve.pbworks.com/f/kirkland_applewood_smoked_spiral_sliced_ham_cooking_instructions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e44cd706-2b50-4c25-bbc9-8bf06df8dc7b/11704038696.pdfIn PDF document text
    • http://zegakodas.pbworks.com/f/oxford_advanced_learners_dictionary_apk_download.pdfIn PDF document text
    • http://junerew.pbworks.com/f/download_pokemon_emerald_gba_rom_for_pc.pdfIn PDF document text
    • http://nosegawibaso.pbworks.com/w/file/fetch/144506847/npte_exam_book.pdfIn PDF document text
    • http://vonodatob.pbworks.com/w/file/fetch/144719343/liranodadasezodovexi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c03ae54-fbfb-43bd-8fbc-bdd2f48b194e/zero_limits_audiobook_free_download.pdfIn PDF document text
    • http://didaneguk.pbworks.com/f/69852545501.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_off00010bf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BF8 5124 bytes
SHA-256: 59bbdaff65e9a00bdb787abab290b804cea9346f4cd5a5fe3484fdee038dcae7
font_01_sfnt_off00011d57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D57 11356 bytes
SHA-256: e5f2a05ddf2457e8b5d9b03890335a36d7e346ef217126276cb31bd4a8b3c9d6