Malicious PDF — malware analysis report

Static analysis result for SHA-256 d40296c5154f1997…

MALICIOUS

PDF

101.6 KB Created: 2021-05-14 01:49:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: b2e672060df7755c0bcb7b82d23e3838 SHA-1: 3c9e5d95f5e344e59f14cecde29b4ce8a6413f86 SHA-256: d40296c5154f1997ffe2da993f3f13e7a3ce0c79ffdef832dcf87b79cad7541c
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many pointing to disposable hosting services, and one specifically linked to a phishing lure about photosynthesis. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of external URIs and link farm heuristics further supports this, suggesting the document is part of a campaign to drive traffic to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://ponafet.ru/strik?utm_term=how+do+you+measure+photosynthesis PDF link annotation
    • https://vexepagofebove.weebly.com/uploads/1/3/4/8/134866030/rizefuz.pdfIn PDF document text
    • https://selegisazo.weebly.com/uploads/1/3/5/3/135323244/dipetil.pdfIn PDF document text
    • http://chambreop.xyz/jurazofamoposiniwurifplhsa.pdfIn PDF document text
    • http://oneitshop.info/prayers_to_rout_demons_and_break_cursessps9b.pdfIn PDF document text
    • http://whitetwo.space/zetenizejwfo.pdfIn PDF document text
    • https://simazilojimi.weebly.com/uploads/1/3/5/3/135345327/822d8.pdfIn PDF document text
    • http://masalev.ru/pimugorujudigarupokiwejs4nmq.pdfIn PDF document text
    • https://gifiboluf.weebly.com/uploads/1/3/2/6/132681188/pobipas_kupiwixojetu_wisoz_lofirekizulif.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/fb1c08ef-ad0a-42a5-9b92-17425544b952/simplicity_is_the_ultimate_sophistication_original_quote.pdfIn PDF document text
    • http://tavoxelelenasi.onlinewebshop.net/53202736151.pdfIn PDF document text
    • http://newemepakirid.myartsonline.com/bipiji.pdfIn PDF document text
    • https://s3.amazonaws.com/bupaxomu/7368045253.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e17f9ec8-329b-4140-abee-63d3a32407fb/directv_genie_2_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/tidigudetefumof/powerpoint_template_wedding_invitation_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c52059d-2f32-468c-a98e-1e0b335eb132/93068471456.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fac8cce4-2abc-4310-91b2-e324f52f552b/how_to_travel_from_hakone_to_mount_fuji.pdfIn PDF document text
    • https://5a2ada08-5b6c-402a-b0df-3636415b461e.filesusr.com/ugd/434ae6_93099b525b1d44c48fc14768817c49a1.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nonipesikiri/xelagiti.pdfIn PDF document text
    • https://s3.amazonaws.com/baxekojojexusol/sennheiser_ew_300_iem_g3_bodypack.pdfIn PDF document text
    • http://sogurorirerew.onlinewebshop.net/applied_statistics_and_probability_for_engineers_4th_edition_solutions.pdfIn PDF document text
    • https://76bf42c0-7447-45ed-8dd3-33f9786ae3ae.filesusr.com/ugd/ba2c19_44a9bb9433794266888fc604956d59c4.pdf?index=trueIn PDF document text
    • https://cae2aa39-5014-47ec-b549-0fed73f36d02.filesusr.com/ugd/c8683e_d5a3028ab68d4477a4c0348ad433c3c5.pdf?index=trueIn 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_off00014f38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14F38 5320 bytes
SHA-256: 7fd000f3c5fb33e69312b292c55f903afbdf7cd7c9b2a7c2068608e395cb07f3
font_01_sfnt_off00016133.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16133 11680 bytes
SHA-256: f9db27a6c7b330fcccf9b4603675eb9ef1f3e14fe3cadf313e3a2f575d9fc40c

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