Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f48f6afe2c65d8f…

MALICIOUS

PDF

81.0 KB Created: 2021-03-24 07:51:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 235a8db74d29038c1ba0d66049c828d2 SHA-1: fe7cb1e55ec3607b6ab1e4a5c7847a9e05b6183b SHA-256: 7f48f6afe2c65d8f8fa729b9b2ec8761ca511f0497c2fe6770fdd4898d04d18c
186 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, many pointing to disposable hosting services, indicating a link farm or redirection scheme. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://soxebez.ru/123?utm_term=anarchy+online+martial+artist+guide PDF link annotation
    • https://cdn.sqhk.co/tasiteregixo/jijaahc/21102752308.pdfIn PDF document text
    • https://fosijegaden.weebly.com/uploads/1/3/4/8/134868146/1988936.pdfIn PDF document text
    • https://cdn.sqhk.co/ravuviwidi/igIboy2/traffic_moto_3d_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451930/normal_60257a6d7273e.pdfIn PDF document text
    • https://dugitesabisaxo.weebly.com/uploads/1/3/4/3/134392589/vobafemuvonasew.pdfIn PDF document text
    • https://dedemapisiwopiv.weebly.com/uploads/1/3/0/7/130775251/gepunotoxik-lifapezalobo-totija.pdfIn PDF document text
    • https://fofivirilisatol.weebly.com/uploads/1/3/4/0/134017796/b008b332fe0.pdfIn PDF document text
    • https://wemijixug.weebly.com/uploads/1/3/4/8/134888196/witurozaxototutilab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369646/normal_60122dc09a824.pdfIn PDF document text
    • https://xedububedopo.weebly.com/uploads/1/3/0/7/130740082/22fa8e.pdfIn PDF document text
    • https://cdn.sqhk.co/nedupugifuka/jcgifhi/megimaxa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417526/normal_6059e3fbc2367.pdfIn PDF document text
    • https://cdn.sqhk.co/bepoweruga/idIhcCi/mobile_patrol_apk_mirror.pdfIn PDF document text
    • https://cdn.sqhk.co/mikedeto/jllgqid/gabejegutujogag.pdfIn PDF document text
    • https://niforowekid.weebly.com/uploads/1/3/1/4/131406966/6441272.pdfIn PDF document text
    • https://wiwovadale.weebly.com/uploads/1/3/5/3/135322143/kakokur-fewukezeju-pesanukutelewut-ziwajopogawetan.pdfIn PDF document text
    • https://wiwazojuxosupud.weebly.com/uploads/1/3/1/3/131379189/dawugejop.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
    • https://72b50e20-f79f-40ca-96b4-24bef83e308f.filesusr.com/ugd/1a1092_e283582c78a3408186a89c0ee54237d4.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tajimipojimo/jogepejokutuzoziluxaga.pdfIn PDF document text
    • https://a5a8f6e1-24ae-425c-880d-6f4079e3c376.filesusr.com/ugd/035627_ae3861446152422aaae1e40febfc22a7.pdf?index=trueIn PDF document text
    • https://9f9bd9fa-00fe-4673-b34e-9a629881f524.filesusr.com/ugd/09273f_0e5371c16ae54c83811d97ae7febf867.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wupixufekijax/26585252315.pdfIn PDF document text
    • https://s3.amazonaws.com/bomupi/52004349365.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_off0000ef70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF70 5324 bytes
SHA-256: 1838fdbac52b2421d1c9ef0d36699546783af1d36f99802b324040f971b9a306
font_01_sfnt_off00010157.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10157 11456 bytes
SHA-256: af96f9d9df1eb62ab825e2ce263b6fda87cfc9231d693abe96d63b3f2d82a62a
font_02_sfnt_off0001284e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1284E 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3