Malicious PDF — malware analysis report

Static analysis result for SHA-256 8538f0a523d08b92…

MALICIOUS

PDF

100.4 KB Created: 2021-04-08 01:24:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 007a9d6801e5aeef0cf5e9a166879cea SHA-1: de44cd971d1bccf294ac0bf97ef235b0b95c9aee SHA-256: 8538f0a523d08b92463e91cbf6ff57034f39c44b0a1d6f048f11fd33809fcc22
136 Risk Score

Malware Insights

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

The PDF file contains a lure related to 'Xbox 360 wireless network adapter gamestop' and a high-reputation heuristic firing for 'PDF_SEO_UTM_REDIRECTOR_LINK' indicating a phishing attempt. The embedded URL https://botokaw.ru/wix?keyword=xbox+360+wireless+network+adapter+gamestop is the primary indicator of compromise. Although no scripts were explicitly extracted, the PDF structure and heuristics suggest it's designed to redirect users to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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
  • 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.
  • 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://botokaw.ru/wix?keyword=xbox+360+wireless+network+adapter+gamestop PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4451574/normal_603f0cb6ac3d9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491445/normal_6022e870d4dfe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419206/normal_5fe6f27a25b5f.pdfIn PDF document text
    • https://cdn.sqhk.co/tefazaturar/dgc1sp1/kaiser_walk_in_flu_shot_oregon.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490735/normal_60641d3e2d6eb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365541/normal_60415c2f9f1dc.pdfIn PDF document text
    • https://cdn.sqhk.co/dewavasese/xypigsG/microsoft_planner_format_notes.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455208/normal_605033c4cbfaa.pdfIn PDF document text
    • https://cdn.sqhk.co/xobanozizesa/idogicf/glowing_live_wallpaper_cave.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402953/normal_6057cb9228963.pdfIn PDF document text
    • https://cdn.sqhk.co/masamiwe/oghWdgh/general_knowledge_questions_answers_tamil_medium.pdfIn PDF document text
    • https://cdn.sqhk.co/xixujipum/ihjaXja/95025423482.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477649/normal_6001561c62aca.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/vuzufexarevima/43035376684.pdfIn PDF document text
    • https://s3.amazonaws.com/lurutopobi/67726590055.pdfIn PDF document text
    • https://s3.amazonaws.com/mejigavukolu/sejikitevunoweramuridut.pdfIn PDF document text
    • https://s3.amazonaws.com/bededuxotulapil/ableton_9_shortcuts.pdfIn PDF document text
    • https://s3.amazonaws.com/xesigeze/dumevubofezowivomozom.pdfIn PDF document text
    • https://s3.amazonaws.com/benuka/gunuwokilawubudebuzomome.pdfIn PDF document text
    • https://s3.amazonaws.com/dowadotiju/does_ky_mean_kentucky.pdfIn PDF document text
    • https://s3.amazonaws.com/dipafuxe/letter_powerpoint_template_free.pdfIn PDF document text
    • https://s3.amazonaws.com/kotodur/12100518948.pdfIn PDF document text
    • https://s3.amazonaws.com/legapatatezisa/61603323763.pdfIn PDF document text
    • https://s3.amazonaws.com/zasepo/sovujatinaduwageniwokaza.pdfIn PDF document text
    • https://s3.amazonaws.com/xakajoziwibi/dell_precision_m4600_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/fulosobezur/livubonewosanojujatovowex.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_off000139a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139A9 2912 bytes
SHA-256: 1dc4d53cc543180180c31573cc7ff31d5166e80dfe0f7d334e321c19e224dfc4
font_01_sfnt_off00014404.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14404 6080 bytes
SHA-256: 2e615c1c2fb4bd61fe9161619212fd6105f54f30bd8213ac6c5b31df1e407fd2
font_02_sfnt_off000158ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x158AC 12112 bytes
SHA-256: afb9f378be8abe24a904117c8017bbd65fbcd598ed249b5da264e7fbd30c777f