Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ba915fabc87b20a…

MALICIOUS

PDF

73.0 KB Created: 2021-03-02 13:29:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: f0cb44a56cc4b01fe2a011d501c77bcd SHA-1: 29f3eff78e931a0a6fbc6ebfa06df1a7fdc9b855 SHA-256: 8ba915fabc87b20a4289f9af960263e85018f458738ee66cab6f64dab3f5349e
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://soxebez.ru/wix?keyword=step+by+step+chapter+22+workbook+answers PDF link annotation
    • https://cdn.sqhk.co/tivinarafuvu/gePihgg/dodapevawub.pdfIn PDF document text
    • https://bobilemako.weebly.com/uploads/1/3/4/7/134733435/3113159.pdfIn PDF document text
    • https://cdn.sqhk.co/komajekolino/aai3jgW/98727791662.pdfIn PDF document text
    • https://ganaletikuwefe.weebly.com/uploads/1/3/4/3/134306697/nogoxojuze-lewirik-rodebevuje.pdfIn PDF document text
    • https://juwufugoxeza.weebly.com/uploads/1/3/4/5/134528381/vegikirafoso.pdfIn PDF document text
    • https://cdn.sqhk.co/xixujipum/Thehhh9/fried_snapper_fish_tacos.pdfIn PDF document text
    • https://cdn.sqhk.co/mikevoponage/6gd9haa/31187714581.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/vonuxagupeduze/gelorafudefimesufosileji.pdfIn PDF document text
    • http://keguwizidolubo.rf.gd/how_do_you_go_into_rem_sleep.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cc31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC31 5620 bytes
SHA-256: f6f697f49ca0d445b65094a2c2db58353af01489185700290aa70782610db585
font_01_sfnt_off0000df5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF5F 10104 bytes
SHA-256: 3c9608429ffb10a95105628acd735636e38fba777ceed2ea155ebbc22bc1b298
font_02_sfnt_off000101e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101E4 16152 bytes
SHA-256: 27dbea658a405d05c7bce15d0828c56848c17d661bcb89c8b15a4334cf5658cb

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