Malicious PDF — malware analysis report

Static analysis result for SHA-256 da5dd37db32eab3a…

MALICIOUS

PDF

74.1 KB Created: 2021-03-11 23:29:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: f0e8d12272c6249e7107d9e06ea0cbbd SHA-1: 3d10887ae6c6707f235fd07bf225bfbbb6f1e2cd SHA-256: da5dd37db32eab3a9e2e131054ea51f8619bc3c8ea3b04a12065983740fc90d5
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to disposable domains and Weebly-hosted files, indicating a link farm or SEO manipulation tactic. ClamAV and ML classifiers identified this as a phishing or malicious PDF. While no scripts were extracted, the structure and URL patterns suggest the document is designed to lure users to external resources, potentially for malware distribution or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://pelibifir.ru/123?utm_term=agnee+bangla+movie+video+song PDF link annotation
    • https://bizekexejanagiv.weebly.com/uploads/1/3/4/5/134593847/8164819.pdfIn PDF document text
    • https://cdn.sqhk.co/vimewiki/hwN34ih/best_100_bollywood_songs_mp3_download.pdfIn PDF document text
    • https://divewamekavese.weebly.com/uploads/1/3/1/8/131860060/8844763.pdfIn PDF document text
    • http://pekibule.iblogger.org/black_law_dictionary_8th_edition.pdfIn PDF document text
    • https://zixojubagever.weebly.com/uploads/1/3/4/6/134613499/4269435.pdfIn PDF document text
    • https://cdn.sqhk.co/leguzufaju/ihfighi/xefezerufudajivimuwovumof.pdfIn PDF document text
    • https://vuxukavimegi.weebly.com/uploads/1/3/5/3/135328550/3175589.pdfIn PDF document text
    • https://cdn.sqhk.co/kulobibab/IggLhix/61411633629.pdfIn PDF document text
    • http://wowosuseje.22web.org/nuwenerimejasebikojokozo.pdfIn PDF document text
    • https://jijejadu.weebly.com/uploads/1/3/2/6/132683218/xuxutejav.pdfIn PDF document text
    • https://lexojonogi.weebly.com/uploads/1/3/4/3/134315697/97a74d.pdfIn PDF document text
    • https://widetidutu.weebly.com/uploads/1/3/1/4/131453832/6215308.pdfIn PDF document text
    • http://kigimol.iblogger.org/jbl_flip_5_review.pdfIn PDF document text
    • https://subokolabipu.weebly.com/uploads/1/3/2/3/132303028/c25b729822.pdfIn PDF document text
    • https://sipinawuzukefo.weebly.com/uploads/1/3/1/4/131410227/renapipu.pdfIn PDF document text
    • https://vikurevago.weebly.com/uploads/1/3/1/6/131606257/kajunomanasuto.pdfIn PDF document text
    • https://tufubigin.weebly.com/uploads/1/3/1/4/131453284/sijelepot-godowejuxon-fowesuneb-lokot.pdfIn PDF document text
    • https://fuwefepitebu.weebly.com/uploads/1/3/4/7/134709748/1a39e4528598798.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pesabumurusese.epizy.com/dell_optiplex_960_network_driver.pdfIn PDF document text
    • http://refiwamidur.rf.gd/13092752332.pdfIn PDF document text
    • http://xigesema.epizy.com/fashion_designer_resume_templates.pdfIn PDF document text
    • http://watijosanowo.epizy.com/78061848792.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_off0000e0f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0F5 5240 bytes
SHA-256: 8d022d6ae44cb97fbd3f900dda0418ff92fb466e097fc09ecc93ced081e0a975
font_01_sfnt_off0000f2c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2C3 14440 bytes
SHA-256: 9ed80720f9baf97d4ae33ed53a46f3b8cec735646d9a3b068bedc8ecbbeefbbf