Malicious PDF — malware analysis report

Static analysis result for SHA-256 97b213885fe9cd45…

MALICIOUS

PDF

83.3 KB Created: 2020-12-31 10:48:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: d66d5c7b2eb81313656175bfdb8cc50b SHA-1: 7374e3d8e73c92f7fdf9a3c8175dd381ba91def5 SHA-256: 97b213885fe9cd451fc1e85fe152a2b55a61be0abe7d8831269125cfffc961d0
156 Risk Score

Malware Insights

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

The PDF file contains a significant number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic, suggesting an attempt to manipulate search engine results or redirect users to malicious content. The presence of a ClamAV detection for 'Pdf.Phishing.Trojan' and a high ML score further support its malicious nature. The embedded URLs, such as 'https://trafficel.ru/123?utm_term=duck+hunt+reloaded+hacked', are likely used to distribute malware or conduct phishing attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://trafficel.ru/123?utm_term=duck+hunt+reloaded+hacked PDF link annotation
    • https://lumodafudewose.weebly.com/uploads/1/3/4/4/134480169/masafoduk.pdfIn PDF document text
    • https://cdn.sqhk.co/joxipadij/o2x5jeU/59033308179.pdfIn PDF document text
    • https://cdn.sqhk.co/doxowite/LBhaCTa/tiktok_news_band.pdfIn PDF document text
    • https://cdn.sqhk.co/rafatuvolix/w2hjbii/dwight_howard_wife_melissa_rios.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475208/normal_5fdb9d62d0d67.pdfIn PDF document text
    • https://lewofadexireg.weebly.com/uploads/1/3/4/8/134868993/ab3b340e1785.pdfIn PDF document text
    • https://cdn.sqhk.co/kolazapikib/rjDgiov/cat_sneezing_runny_nose_drooling.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369304/normal_5f90d347c6dd9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443588/normal_5feb214faad14.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wiremeresegikon/vitegiliwixusog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8313e7e9-8478-4de0-99ac-6c168bf480d5/claw_grab_prize_machine_for_sale_gold_coast.pdfIn PDF document text
    • https://s3.amazonaws.com/guxosa/pevolazunejuw.pdfIn PDF document text
    • https://s3.amazonaws.com/tumasun/zilemusazexuvugabelavale.pdfIn PDF document text
    • https://s3.amazonaws.com/sibenuvokiwuz/hp_scanjet_5590_drivers_windows_10.pdfIn PDF document text
    • https://s3.amazonaws.com/jukezeluf/korelurovurenesunuj.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_off00010955.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10955 4912 bytes
SHA-256: 64f04dcf8ac2a87eec9660893a0ca6f3d9c55fb115cb9dc5eeaee72b3642069c
font_01_sfnt_off00011a08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A08 11592 bytes
SHA-256: aaf2ca30146472824711fb892f21e7a11823e1ce0cf32fe182cc03fe1e3ace9c

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