Malicious PDF — malware analysis report

Static analysis result for SHA-256 600a0c2340facd66…

MALICIOUS

PDF

72.3 KB Created: 2021-06-09 06:04:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 150d3bcf4a892014890f7d588d76f24c SHA-1: 79082dfd03282e79bd07843f44e6c2f638583c97 SHA-256: 600a0c2340facd66b191cc5863c36713c307a773307206888a2c00bdbd7e2f59
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to documents hosted on various platforms, suggesting a link farm or phishing attempt. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the heuristic firings point to a malicious PDF designed to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://drafthe.ru/pbw?utm_term=list+of+common+irregular+verbs+pdf
    • https://static.s123-cdn-static.com/uploads/4475208/normal_5ff33d89ce10a.pdf
    • https://cdn-cms.f-static.net/uploads/4460983/normal_605a98c9ab7b2.pdf
    • https://gogafijunovox.weebly.com/uploads/1/3/4/3/134322332/5388484.pdf
    • https://cdn-cms.f-static.net/uploads/4393033/normal_6023e6a28f228.pdf
    • https://cdn-cms.f-static.net/uploads/4411229/normal_606c379c9ffd2.pdf
    • https://kexanitafax.weebly.com/uploads/1/3/0/8/130813084/0e371f3bef19.pdf
    • https://bezujopejot.weebly.com/uploads/1/3/1/6/131606295/lelepilerole-sanevesufuvif-zusitugogojover.pdf
    • https://jaxedafotonomut.weebly.com/uploads/1/3/4/8/134885779/fimumudimom_pofaripol_xupavaza.pdf
    • https://static.s123-cdn-static.com/uploads/4408711/normal_5fe4421f3cf85.pdf
    • https://cdn-cms.f-static.net/uploads/4374954/normal_60490482ba545.pdf
    • https://cdn-cms.f-static.net/uploads/4479435/normal_601f355674dc1.pdf
    • https://cdn-cms.f-static.net/uploads/4419430/normal_6023c5ff5cf87.pdf
    • https://cdn-cms.f-static.net/uploads/4489032/normal_606716fa7095d.pdf
    • https://bekefopu.weebly.com/uploads/1/3/4/6/134692172/mupanela_rewukazi.pdf
    • https://cdn-cms.f-static.net/uploads/4389824/normal_60bb923b85b1c.pdf
    • https://cdn-cms.f-static.net/uploads/4484375/normal_606b320d34796.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fokopaviwu.pbworks.com/w/file/fetch/144464190/fedopiwixiziligenedojeja.pdf
    • http://pevozowo.pbworks.com/w/file/fetch/144423927/fce_for_schools_practice_tests_2019.pdf
    • https://uploads.strikinglycdn.com/files/95e63adb-5bab-4872-a5a6-7d74e6cd7ad9/xebowosawategubaretovosa.pdf
    • https://uploads.strikinglycdn.com/files/415a1a1f-36af-4731-b77f-de494cd3f296/what_is_the_role_of_a_systems_engineer.pdf
    • http://murenet.pbworks.com/w/file/fetch/144615537/46266528732.pdf
    • http://pajinap.pbworks.com/f/poultry_farming_project_report_4000_birds.pdf
    • http://sovafiben.pbworks.com/w/file/fetch/144777648/mecanica_vectorial_para_ingenieros_estatica_10_edicion_descargar.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dcd3.bin
4f0ca36164aed7fdcd4514e25c5ba6ae7735fbf4aa4f993658860c13d665e56b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDCD3 5616 bytes
font_01_sfnt_off0000efe5.bin
e9edf4f64526e31f19c9b3bdbc72887384323a352e685244427ea9a95ccba5d1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEFE5 10052 bytes

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