Malicious PDF — malware analysis report

Static analysis result for SHA-256 08c9ef090ca34418…

MALICIOUS

PDF

82.0 KB Created: 2021-05-23 19:26:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 06594ae8508b6470213b54ca8d64de54 SHA-1: 44417a5ed1dd744a3f8a3b20d0c31645be4a2041 SHA-256: 08c9ef090ca34418b3dbb4c497efca43e1d656ef18532d27b188c2af80370e52
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious sites. The document body, though partially corrupted, appears to be a lure related to technical support or device troubleshooting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://cdn-cms.f-static.net/uploads/4481418/normal_603ff78daa566.pdf In PDF document text
    • https://ziwarafe.weebly.com/uploads/1/3/4/3/134306838/peduge.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459636/normal_5fde6e809ca16.pdfIn PDF document text
    • https://vutakajar.weebly.com/uploads/1/3/4/8/134896426/1479026.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455684/normal_60468e3490735.pdfIn PDF document text
    • https://tebafazar.weebly.com/uploads/1/3/4/2/134265880/5203253.pdfIn PDF document text
    • https://sefokasezasun.weebly.com/uploads/1/3/4/6/134690402/kowiwerupera_vupadutub.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455902/normal_604cb6da709d6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494648/normal_605d22ca1bd1d.pdfIn PDF document text
    • https://dubitofux.weebly.com/uploads/1/3/4/4/134458445/jolebamig_wifutesina.pdfIn PDF document text
    • https://xovawezovikax.weebly.com/uploads/1/3/0/9/130969403/cd349.pdfIn PDF document text
    • https://luwidejike.weebly.com/uploads/1/3/4/8/134881341/kezus.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406202/normal_6020d5520e4fd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425235/normal_600b78167afc2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370064/normal_601bb50c2f7c8.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
    • http://feedproxy.google.com/~r/wb/ENAH/~3/n4t4wXRn-MA/wb?keyword=how%20to%20turn%20off%20safe%20mode%20on%20a%20verizon%20ellipsis%20tabletPDF link annotation
    • https://uploads.strikinglycdn.com/files/e7f6b42b-cd84-4f62-8c3f-693a23576577/ledapuludurofe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6592932c-c7cf-4e4d-a8bd-49129214f9a1/how_much_does_a_7_cu_ft_chest_freezer_hold.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e47338d-00bb-410d-9785-6c2f9eec0c1a/masterbuilt_electric_turkey_fryer_and_seafood_kettle_recipes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c411b43-05d2-425b-b8d7-69040902e6cf/jubaxujotefawababazoxe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b78b65c6-8352-4be7-b16b-7ba5fed0ce1d/wordpress_get_installed_plugins.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9cb48b3a-5673-4227-ae51-cfe36193faa4/81829941410.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5db8268b-8fc0-40ef-8e09-aaa422e0af34/reliacard_michigan_child_support_login.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e2aa8e1-d945-4fc6-a671-97dda03704ca/68752451636.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f52d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF52D 5372 bytes
SHA-256: 21ab86c15e66714bb15c613e86ff7ac05ea8f02d47fc156aed19efab336e326f
font_01_sfnt_off0001076b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1076B 10732 bytes
SHA-256: 07fabe64e7cdb5f198bc995d20e104afff7a25e9e4cfa37ddaf6436139b647d4
font_02_sfnt_off00012c0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C0A 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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