Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffa9b650bd9a6d76…

MALICIOUS

PDF

77.8 KB Created: 2021-03-23 16:53:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 06c93ed66d9c6d796301174b7bb47575 SHA-1: c509e1cccfda7cacda89053f07ef521e51ea9262 SHA-256: ffa9b650bd9a6d76223b30f849ee38d91c9b048da09b6707de71992c87635f5c
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external links, with one pointing to 'xajibur.ru', suggesting a link farm or phishing attempt. The document body is heavily obfuscated, but the presence of embedded URLs and the heuristic findings strongly suggest it's designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://xajibur.ru/award?keyword=urine+colour+chart+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4386849/normal_601bfe44770be.pdfIn PDF document text
    • https://tonuvufew.weebly.com/uploads/1/3/1/4/131438708/nobudokimitumi-kokotefaz-zaguke.pdfIn PDF document text
    • https://ruwadegefanum.weebly.com/uploads/1/3/4/1/134108857/winemegikumaxebe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443815/normal_6029701b3680a.pdfIn PDF document text
    • http://wusozupu.mypressonline.com/vehicle_dynamic_control_system.pdfIn PDF document text
    • http://kosonetibekub.medianewsonline.com/medical_microbiology_mcq_book.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382197/normal_5ff0a97faca9b.pdfIn PDF document text
    • https://matamelo.weebly.com/uploads/1/3/1/3/131384575/gevasagabotew.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499351/normal_602ac8a869630.pdfIn PDF document text
    • http://vovavipegum.getenjoyment.net/53105549122.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://db244590-af71-4c33-bd6e-2f8f55f31281.filesusr.com/ugd/fdab61_7d6ca78f9b794b3b93519ae9cd95cf9d.pdf?index=trueIn PDF document text
    • https://1923692e-f727-4f58-80a8-3583160180e3.filesusr.com/ugd/c4ccc4_0de70c1ab9094785b17a9dcd5fb14f15.pdf?index=trueIn PDF document text
    • https://1c437d0a-cccb-4a8a-93f1-39e0b5126915.filesusr.com/ugd/b91566_5dbc22b7be03408187c60914d469f1a6.pdf?index=trueIn PDF document text
    • http://duvodix.myartsonline.com/aqeedah_wasitiyyah_urdu.pdfIn PDF document text
    • https://1e438cd7-6f3b-42ac-a97b-d13a75fa135b.filesusr.com/ugd/0c268c_5f597e7e6e4746b5a467df891842f2ea.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/4370b830-f559-4a24-804a-9d0cc71e501b/kifavoxadilibupajedefuw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/61c47336-9f78-478b-a6fa-1f12beabeeff/bofamejirerariwifufokobo.pdfIn PDF document text
    • https://47a25507-5c4f-4e73-9b7c-0c49514c8174.filesusr.com/ugd/e00bd3_eeba2bfda05a4a50a98a0913752c2bd6.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_off0000f202.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF202 5056 bytes
SHA-256: 6e501e44eede2988dc7eeff9f8f28b147b27ab9277614baa23a2bb0e93d8a793
font_01_sfnt_off00010333.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10333 11240 bytes
SHA-256: ff97deec06fbb2144488a00b8f312ecaad2b6971fda11276a2d920de0a4d8e39

Open this report in the interactive analyzer, or submit your own file for analysis.