Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4f13fefab83f985…

MALICIOUS

PDF

72.6 KB Created: 2020-12-03 18:45:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 55e08a14f895d47198411acdfd0cec8e SHA-1: e8947bbf5a0d0050737fbc4c3d2bd0c09f1a8231 SHA-256: f4f13fefab83f985c24eab1915551ac544ec0848de460af82c073ea97ee33e31
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains an embedded URL that redirects to a suspicious domain, likely intended to lure users into downloading further malware or providing sensitive information. The document body contains garbled text, suggesting it is not intended for direct user consumption but rather as a vehicle for the embedded malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://traffnew.ru/aws?utm_term=promo+video+template+after+effects+free PDF link annotation
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://static1.squarespace.com/static/5fc5994cea4a794d56652742/t/5fc8bb87b0f45b2a3d2c7ccb/1606990732721/pivamazo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c841370f-0e58-4878-9176-f9cd9e8185fc/99971747171.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8dc76a7-02cd-4159-b2e8-7400796d693e/poveni.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe098bbc819f1cf49fb79b/1606289803885/27978737776.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b8b9b34-8747-4108-aa16-691a7193d823/48266071169.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc59ce5c89e1c4b8fdeae25/t/5fc643293485235c869c03b9/1606828845870/background_color_for_us_passport_photo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3cc04b01-6ed7-4fff-afd7-e0f820d84d81/69529285244.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5a56f6b97992eb57bf598/t/5fc8368fa9f67830caf2cd5e/1606956688156/2355068999.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6714ab58-b8d3-44f0-9d33-5750cb31e831/22196951861.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa4597dd-72d8-490a-92fd-384ffa1dcf5a/percy_jackson_sea_of_monsters_mp4.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0dd745bcb0228a2824d01/t/5fc14e0cf3de5e49b594bab5/1606503948615/conceptual_physics_paul_hewitt.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc65001ff13940aa26461bc/t/5fc7b55a788a962b7c390e2c/1606923610822/fear_the_walking_dead_season_6_cast_virginia.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cde282b8-c243-44c9-855d-e9e07a30e5fe/78845170066.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/999c94c1-cd3b-4725-aded-35fbaa6b5ace/geometry_1.2_segments_bisectors_midpoints_worksheet.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_off0000d23a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD23A 5044 bytes
SHA-256: 80826870c718b9828761cd4b386c9f123cfb9da72d687c083591b965050dcc37
font_01_sfnt_off0000e365.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE365 10392 bytes
SHA-256: ce01563070a6d39e7364e0be00df984c7f012316dec5d54de8062597a5df1ebe
font_02_sfnt_off000106d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106D2 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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