Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e79ca9998c1bbff…

MALICIOUS

PDF

72.4 KB Created: 2021-03-02 18:14:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 2def74795ceda9cdd9ebfc2c4dc48ddb SHA-1: bbf535a721f15d6fc441e27c720cf2111dbaaed7 SHA-256: 9e79ca9998c1bbff545d5725876caf33772be0c7579e2b08f4281b4b2cf5365a
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document uses a lure related to a consumer product to trick the user into clicking a malicious URL. The heuristic 'PDF_SEO_UTM_REDIRECTOR_LINK' and the embedded URL 'https://seumenha.ru/123?utm_term=how+to+use+gillette+fusion+proglide' strongly indicate a phishing attempt. The ML classifier and ClamAV detection further confirm the malicious nature of the file.

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
  • 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://seumenha.ru/123?utm_term=how+to+use+gillette+fusion+proglide PDF link annotation
    • https://cdn.sqhk.co/jirudumom/dgjU5hf/mutant_creatures_addon_mcpe_monster.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461777/normal_5feb9fc254cbe.pdfIn PDF document text
    • https://cdn.sqhk.co/moromasi/ogiEhaD/monalabigumebuluxe.pdfIn PDF document text
    • https://cdn.sqhk.co/kulukopupiw/jcggJig/xaxutiwiwa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404121/normal_601fa8003a630.pdfIn PDF document text
    • http://blue-tick-central.com/heart_and_blood_vessels_worksheetm4j5l.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417656/normal_602ee112cfd54.pdfIn PDF document text
    • https://cdn.sqhk.co/kupulifip/ifLjehj/knight_of_cups_career_outcome.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474977/normal_6018605b735a5.pdfIn PDF document text
    • https://cdn.sqhk.co/fuluzagile/1qhh5OO/70696662061.pdfIn PDF document text
    • http://appless.space/autodesk_maya_latest_version_freerpi4q.pdfIn PDF document text
    • https://cdn.sqhk.co/satidaruxami/jaRoLge/zibafezikevojigaganizaso.pdfIn PDF document text
    • http://awpmode.com/ezdrummer_2_sound_library_download_crackt7nb5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365621/normal_5fe487ea2fcca.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/kalanejaxutilif/movie_pirates_of_the_caribbean.pdfIn PDF document text
    • https://s3.amazonaws.com/gulapore/anime_love_couple_wallpaper.pdfIn PDF document text
    • https://s3.amazonaws.com/divelatoxa/bill_of_rights_kenya.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_off0000dbb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBB8 5052 bytes
SHA-256: 0770b984a95c4d701bfeb0b849e3f8ea8ab84ae7a8cdaf3796947024d2637786
font_01_sfnt_off0000ed0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED0E 11636 bytes
SHA-256: eb36bef5ccf8eb576559f542c974c6cd541b0750da224e244a7e2ef8a8151f3a

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