Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee98d21e14cfa0d3…

MALICIOUS

PDF

78.4 KB Created: 2021-03-14 10:59:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: ee8ac80b2b562bfc1a26a2c776f0266d SHA-1: 618da8a44d50f740eded934ad661e20cb441b929 SHA-256: ee98d21e14cfa0d307ef67aa500d4ba7e67980ddf900136444de17c92bef4afd
186 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many hosted on disposable domains, characteristic of a link farm designed for SEO manipulation or phishing. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution via these links. Although no scripts were explicitly extracted, the PDF structure and link farm heuristics suggest it's designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://mezovuduw.ru/award?keyword=logistics+and+supply+chain+management+ppt+pdf PDF link annotation
    • http://noxesim.iblogger.org/other_comprehensive_income_can_be_reported.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485589/normal_5fe0dda1542f9.pdfIn PDF document text
    • https://domenadonasi.weebly.com/uploads/1/3/0/8/130874365/zavut-gemujax.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413455/normal_5fe23f4daefef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393901/normal_603c4a2b9ff0d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463812/normal_601c5b6ac4bb9.pdfIn PDF document text
    • https://gakurajoduradi.weebly.com/uploads/1/3/4/1/134131237/2c8ed08545d46fd.pdfIn PDF document text
    • https://mikotefi.weebly.com/uploads/1/3/2/6/132695671/e5727351dcd.pdfIn PDF document text
    • https://kupowenip.weebly.com/uploads/1/3/4/0/134042521/da9e75f3c27f15.pdfIn PDF document text
    • https://wulafuxuzezam.weebly.com/uploads/1/3/2/3/132302924/98656.pdfIn PDF document text
    • https://josodurug.weebly.com/uploads/1/3/5/3/135394296/5177641ac2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406787/normal_5ffab44971c51.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/6daed5ee-d033-4cba-bcd4-45f05a704e2b/how_many_horsepower_does_my_pool_pump_need.pdfIn PDF document text
    • http://wuxipuretox.rf.gd/temasaji.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18ed8511-771c-4da5-8b66-5a205f43a169/miracle_morning_affirmations_formula.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0732ec7f-b2af-46e2-b252-270f91866d81/nobelavetefe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56077ca2-19bd-482b-9c21-b94c2adea329/laboratory_manual_for_anatomy_and_physiology_6th_edition_ebook.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec43fea5-01e1-4d3c-9639-a756d5ece5a8/13874759792.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e17cd1af-5cd2-4d67-bddb-863d46730a90/what_is_fresh_off_the_boat_mean.pdfIn PDF document text
    • http://gixogofano.rf.gd/17780111451.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb6548ae-3834-419d-8a4c-b67c34cbe500/total_gym_ultra_price.pdfIn PDF document text
    • http://rajemezipuz.rf.gd/mizezadudaf.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_off0000f343.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF343 5516 bytes
SHA-256: be91972e49bda8fe596df63b44e1f5b8aaa260baf97ac69b8fbcdde4f99d4dbb
font_01_sfnt_off000105f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105F8 11128 bytes
SHA-256: 2a60fc79ae72a790e9ca317ac50aab26c859c8aa3eadda54652913b730e7ef55