Malicious PDF — malware analysis report

Static analysis result for SHA-256 9410f672e9f4f591…

MALICIOUS

PDF

75.0 KB Created: 2021-05-08 15:44:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 8d9c6e95cef7fcb9292797916475da4b SHA-1: bb48e65af3863269fe866a4435ac9d1a96e01853 SHA-256: 9410f672e9f4f591541f42bc35f6dbbde2fb9b315d4e1a5efbdd8860de80b3e9
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains a high-risk heuristic indicating it's an SEO redirector link for phishing, disguised as a review for a 'Predator generator 4000'. The ML classifier and ClamAV detection strongly suggest malicious intent. The primary IOC is the redirector URL, which likely leads to a phishing or malware download page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://baarspo.ru/strik?utm_term=predator+generator+4000+review PDF link annotation
    • https://cdn.sqhk.co/koditisalupe/gSiiNgh/85390709358.pdfIn PDF document text
    • https://cdn.sqhk.co/zejejofe/dThekid/hot_wheels_unlimited_mod_download.pdfIn PDF document text
    • https://cdn.sqhk.co/fasaparoba/igfjb8H/xuzolef.pdfIn PDF document text
    • https://cdn.sqhk.co/finulepaf/jijggjX/elfen_lied_lilium_viola_sheet_music.pdfIn PDF document text
    • https://cdn.sqhk.co/sokulutesi/Pjjjdji/xonepofaras.pdfIn PDF document text
    • https://cdn.sqhk.co/kufagilan/bgfbJgg/boo_boo_records_instagram.pdfIn PDF document text
    • https://cdn.sqhk.co/tororukiwuri/PdgjgjL/venopisedusovet.pdfIn PDF document text
    • https://cdn.sqhk.co/kidatufo/ct1xJVJ/amtrak_route_map_northeast.pdfIn PDF document text
    • https://cdn.sqhk.co/toralapiluw/OKCiggd/skulduggery_definition_british.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nekezoxugi.rf.gd/xifolizaresoputazo.pdfIn PDF document text
    • http://jetetejev.rf.gd/36929896971.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37aa2038-c8c7-457b-8eef-7b71ff8b0e8e/star_identifier_app_for_iphone.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48c353be-8562-4209-a073-e71d43a0d134/42228267299.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ab4fdba-b702-4f90-9666-e8a794292817/74271100286.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ab498ce-e39c-476d-a1e0-78f7a057d527/jeluriwupovuxikoniza.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/547f9a32-2005-4e78-8169-f2aadf5eaa3c/present_perfect_tense_exercises_for_class_7.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6039c88f-04a8-4124-ba8c-bd873f70fea9/pathfinder_inner_sea_world_guide.pdfIn PDF document text
    • http://jawuguv.epizy.com/lovokixojegifebepe.pdfIn PDF document text
    • http://selanexuv.rf.gd/21175207482.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_off0000e9f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9F6 5168 bytes
SHA-256: 02ec3ac13bfa25e9b481371b351d76093e0ce1d3831928bf01b822d0de18d1cb
font_01_sfnt_off0000fbad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBAD 10336 bytes
SHA-256: 1463e625b6095b97c444119983e8fbc5fa8592c736c774b065d5d93fc8f01cd6

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