Malicious PDF — malware analysis report

Static analysis result for SHA-256 04d10a62efc7080d…

MALICIOUS

PDF

78.6 KB Created: 2021-07-21 14:04:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 8c7c0ea71ee60fe7d19cec7f3c9ba2fe SHA-1: f07d67abf0decc1f068077c95573c60b6383692f SHA-256: 04d10a62efc7080dd94f23fe58c29c6cffe12d9912ba4e9af627dbd9329275b8
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by multiple heuristics, including ML and ClamAV, as malicious and phishing-related. The presence of a PDF_SEO_UTM_REDIRECTOR_LINK heuristic indicates a lure for free downloads, leading to a phishing site. While no scripts were extracted, the PDF structure and heuristics strongly suggest a phishing attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8028

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/sq/ugae/~3/iXsW93xxTQA/square?utm_term=grabill+cabinets+dealers PDF link annotation
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e8c24ab80adc27fb583927/1625866826422/network_topology_and_its_types.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60f72fed036f6e73aa74d6ac/1626812398041/find_the_equation_of_a_line_given_one_point_and_perpendicular.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f505e629712869f07bb0db/1626670566290/37041332638.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e8e2f3db8bb141bad61922/1625875187976/unlimited_power_tony_robbins_review.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f1d363952a081d9376b59b/1626461027551/ideal_and_real_gases.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_off0000d130.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD130 16992 bytes
SHA-256: 42f3ff38df25613b3030e4f1a9f3eb186cb48628cd041fc90fc322b3b36513f7
font_01_sfnt_off0000fd75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD75 10424 bytes
SHA-256: 71a9a046d9ed759aef314a9ca7794053f7ec5b31ddb5b5f5520eec8a42221911
font_02_sfnt_off00011532.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11532 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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