Malicious PDF — malware analysis report

Static analysis result for SHA-256 2167357210cb8c11…

MALICIOUS

PDF

74.7 KB Created: 2021-06-10 05:05:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: f45d21839733f756860392361f6b8850 SHA-1: 4cc4a3702f3a98f8c96a45f79f8d18af855cffb2 SHA-256: 2167357210cb8c11bb89b760de04d4d6d7ff084bee0ef371af48e60ed2c7bb5c
194 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with one prominent URL pointing to a site offering a 'free fire booyah day mod apk'. Heuristics indicate this is a link farm on disposable hosting, and ClamAV detected it as 'Pdf.Phishing.Trojan'. The presence of a download button lure further supports a malicious intent to trick users into downloading potentially harmful files.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://garglob.ru/pbw?utm_term=free+fire+booyah+day+mod+apk+unlimited+diamonds PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4421477/normal_5ffd58248d0cc.pdfIn PDF document text
    • https://lulakoxefinadi.weebly.com/uploads/1/3/4/3/134332070/874ef9.pdfIn PDF document text
    • https://jajatimipe.weebly.com/uploads/1/3/1/4/131482958/wijed.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390069/normal_600404a0127a5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495985/normal_600b62c83b9f8.pdfIn PDF document text
    • https://tagepixibupiz.weebly.com/uploads/1/3/4/5/134586800/8002790.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472788/normal_600d84856bf8a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486965/normal_603a7210dd003.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480382/normal_604cf04403674.pdfIn PDF document text
    • https://guvijubeb.weebly.com/uploads/1/3/5/3/135318684/laneliliweninadap.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4528876/normal_5fda8ce2ab0a8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477155/normal_60496ebb99349.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/31354877-ae9a-4710-9b3c-d5307fe9a458/8170720371.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f995947-01b6-4889-a326-de7297e98ec0/lord_of_the_flies_chapter_8-10_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f1635ae-30d3-40e9-b906-3d7582e2c578/13054939906.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0cc75a64-8ad7-43ef-92e4-34eb5f075abd/why_do_atoms_join_to_form_molecules.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d87aefe8-cf21-40d2-a57a-954834df717a/tefasizojovitu.pdfIn PDF document text
    • http://buvavipoluvu.pbworks.com/f/12503042540.pdfIn PDF document text
    • http://pugaxigodaka.pbworks.com/f/47063333757.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af85b5b9-e265-4bdc-8e2d-afdb1dc35c7d/public_relations_for_dummies.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_off0000e245.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE245 5544 bytes
SHA-256: 6a8598a492daaab069ee71a0349dfa9f053fad61b9ae8ad80cdc412919b006ea
font_01_sfnt_off0000f4f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4F7 11100 bytes
SHA-256: be0ceb6bdaf190ef43356f8ec15ca2d8521b425ff4062bd8e3238ee48395ee5f