Malicious PDF — malware analysis report

Static analysis result for SHA-256 f51931a7bba7501a…

MALICIOUS

PDF

71.4 KB Created: 2020-12-25 03:28:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 5b5e094d01f8d817ffc79e4a24f64ce9 SHA-1: 7cd66a1f9b5e8d2ca495db0c6e8790ef407c1f85 SHA-256: f51931a7bba7501aa33c34225cacadf1f93be998f8da27cad8d22e2982052cd4
254 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file contains a significant number of embedded links, many of which point to a redirector infrastructure. The primary redirector URL is https://traffking.ru/123?utm_term=how+did+bob+ewell+really+die, which is associated with malicious activity. The document body is heavily obfuscated, but the presence of numerous external links suggests an attempt to direct users to potentially malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://traffking.ru/123?utm_term=how+did+bob+ewell+really+die In PDF document text
    • https://cdn-cms.f-static.net/uploads/4453563/normal_5fa4d81fb9079.pdfIn PDF document text
    • https://kefobisow.weebly.com/uploads/1/3/4/7/134733217/7344699.pdfIn PDF document text
    • https://dedutosaku.weebly.com/uploads/1/3/4/8/134852257/dusazamegiveve.pdfIn PDF document text
    • https://dumisoxi.weebly.com/uploads/1/3/4/6/134625223/665b250121580.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385436/normal_5f8e67adf2055.pdfIn PDF document text
    • https://vefozifus.weebly.com/uploads/1/3/4/3/134382693/pokik_ripupumu_wukedazivujafom_ritesirapaku.pdfIn PDF document text
    • https://rebolotor.weebly.com/uploads/1/3/4/3/134364816/zokakidoposum-dovovisuli-xowaliloke-rorowidufub.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/7fe3dfbf-5155-4750-9fd7-ff306e6c50b9/synthesizing_sources_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/viromibukoleliw/restaurant_management_interview_questions_and_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4bab20ad-44a6-47d1-858f-e475a7ed5898/harry_potter_catholic_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/turip/the_car_racing_games_free.pdfIn PDF document text
    • https://s3.amazonaws.com/liguwubore/behaviorismo_educao.pdfIn PDF document text
    • https://s3.amazonaws.com/gazijewevan/accounting_standards_as_per_icai.pdfIn PDF document text
    • https://s3.amazonaws.com/wofaxil/56484581123.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000da34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA34 4936 bytes
SHA-256: 67900d79f0823bb3fa9027100d041e7fa2d2760ab5fdd42ba422aa1aa89868ef
font_01_sfnt_off0000eb1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB1B 11292 bytes
SHA-256: bb8c0d75bfeea4bc133f5872ef0b9331475c42f11b2603e243737602da66a8ac

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