Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d01d0833b713004…

MALICIOUS

PDF

88.4 KB Created: 2021-03-30 19:24:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 0562abc2fbcaada02a1193604a62a8be SHA-1: 5a76b19b4488878c762f7ae5f280b3dbdaaef301 SHA-256: 1d01d0833b7130043142844942d23fdcdcda3c8a38f4743e5cfb908a93a2440f
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://baarspo.ru/strik?utm_term=ibm+and+the+holocaust+youtube PDF link annotation
    • https://nufewaxitobazat.weebly.com/uploads/1/3/4/7/134748461/mimijojematev.pdfIn PDF document text
    • https://weralafopibobal.weebly.com/uploads/1/3/4/3/134338927/bizefadusepidodofemu.pdfIn PDF document text
    • https://mejotozoferu.weebly.com/uploads/1/3/4/8/134866749/zutoxisamufib.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411923/normal_605aaf9a0c0c9.pdfIn PDF document text
    • http://nuveclovet.xyz/what_it_means_to_dream_pregnanth9dyi.pdfIn PDF document text
    • https://buresususotolo.weebly.com/uploads/1/3/2/7/132710635/panujezikebupiv.pdfIn PDF document text
    • http://tryici.xyz/2592819835q4mt3.pdfIn PDF document text
    • http://3bki.ru/nubs_adventure_full_apk_1._6djezj.pdfIn PDF document text
    • https://zidadosivifaju.weebly.com/uploads/1/3/0/7/130775619/jomofupuxanisobe.pdfIn PDF document text
    • https://rujuzodojavumip.weebly.com/uploads/1/3/4/7/134726220/mifolewinozinapapab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411717/normal_5fd78941a9f92.pdfIn PDF document text
    • https://getaforufuzok.weebly.com/uploads/1/3/4/7/134733873/xekuxaxexad.pdfIn PDF document text
    • https://molusodufewi.weebly.com/uploads/1/3/4/4/134465793/siwologurifagelak.pdfIn PDF document text
    • http://help-feedback-amzn6.xyz/23841565705xtznn.pdfIn PDF document text
    • https://cdn.sqhk.co/fuguwaso/kmGsjga/17534498196.pdfIn PDF document text
    • https://cdn.sqhk.co/kojuzipag/hPFyigq/download_bike_race_bike_blast_rush_mod_apk.pdfIn PDF document text
    • https://gufobetatogeset.weebly.com/uploads/1/3/1/0/131069923/05bf7a9.pdfIn PDF document text
    • https://cdn.sqhk.co/loberutebe/ghahhQL/rangers_of_oblivion_gift_code.pdfIn PDF document text
    • https://lozugukavokukes.weebly.com/uploads/1/3/4/3/134357100/ripululogob.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://2a497570-3881-454f-aefc-229a18bbdf22.filesusr.com/ugd/83e24f_3db45ae1cfd046259a9b0b8f9e6ecf01.pdf?index=trueIn PDF document text
    • https://11fe2947-f393-4df3-905d-f9f3730e834a.filesusr.com/ugd/b1b16e_74919238476c470cba1f9149ea6b1419.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_off00011f7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F7E 5260 bytes
SHA-256: 22b33660ff4223d99caa130f7be741befc0465a17f4d7ae4c651b8b628f98669
font_01_sfnt_off0001313b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1313B 10364 bytes
SHA-256: eed6905c8ca558b3729d711cccccb96bfa67a77dd64c96adca5e2029764f3dd0

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