Malicious PDF — malware analysis report

Static analysis result for SHA-256 9589745415b189df…

MALICIOUS

PDF

82.0 KB Created: 2021-07-12 21:49:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: dbab0c64ac653146ade601a5c8171c5c SHA-1: f5d92ccbceee7f7eca8737e1ace7bdf57893bb65 SHA-256: 9589745415b189df75943bb2bb1f16c3726c6155174fad5e79e7b9cb3fca6e7f
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a high-severity heuristic indicating it's an SEO redirector link used for phishing, disguised as an image. The ML classifier also flagged it as malicious. While no scripts were extracted, the presence of a redirector URL suggests an attempt to lead the user to a malicious site, likely for credential harvesting or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6166

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://feedproxy.google.com/~r/razvivatel/yapz/~3/iXsW93xxTQA/square?utm_term=intimacy+with+your+partner PDF link annotation
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e94a08b10b9b33fa98fd8a/1625901577104/how_to_cast_my_android_phone_to_my_smart_tv.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e8c259af17b116dc5da0e8/1625866841942/best_way_to_sell_clothes.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ec812d288cf71862a94a9b/1626112301500/1986_to_1993_mustang_for_sale.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e768bb811a51280ff75f16/1625778363455/what_is_the_definition_of_spoils_system.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://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_off0000df14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF14 10676 bytes
SHA-256: c8b3f9bff25037f56ff3ea21afa90308ab95fc6056903e2055fb3b470ec48688
font_01_sfnt_off0000f776.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF776 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010f88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F88 17336 bytes
SHA-256: 39a4e8b83e114cf105ae0b2605458a597a033d74b77ddca81dd52003b803694e

Open this report in the interactive analyzer, or submit your own file for analysis.