Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a91cc1999543cda…

MALICIOUS

PDF

83.0 KB Created: 2021-07-14 03:16:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 3a5c6dc8424f1ffb8586e956ba9d9b08 SHA-1: 8bfc5bf374527a8c9f848cf18dd8a49ae5a8cd71 SHA-256: 9a91cc1999543cdafd1c9cffae553f47269329266874cbb54215a2d148508489
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by multiple heuristics, including a high-severity 'PDF_SEO_UTM_REDIRECTOR_LINK' and a critical 'CLAMAV_DETECTION' for 'Pdf.Phishing.Trojan'. The presence of an embedded URI pointing to a redirector suggests a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the nature of the PDF and the detected threat indicate it likely serves as a lure to a malicious site or payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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/~3/5VO7y1TeAqQ/square?utm_term=does+broken+sleep+make+you+tired PDF link annotation
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ed9d1c8d40d36f0083e746/1626184988129/jumble_words_worksheet_for_class_5.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ede29be83f616bcf833616/1626202779546/zexelakasubukupomaji.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ee27850981f36585a09849/1626220422060/tulew.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e91d33fc46b1505827f746/1625890099263/largest_cell_in_human_body.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60ee08b3e7148d06bc6c9186/1626212531414/durazobukijezu.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e8ceab8b9e53115d66a706/1625869996037/madea_goes_to_jail_free_online.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e9462c8fb24157da714552/1625900588572/17539194742.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60edd4fe9942ff19c7667c99/1626199294498/name_two_pairs_of_corresponding_angles.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60edc36f1c6c1a61d5224226/1626194799471/how_to_print_powerpoint_slides.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e944a858c6623f038374e2/1625900200168/how_to_astral_project_guide.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e84e510513ea69873a8a80/1625837137543/fat_loss_workout_for_females.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e1c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1C2 16660 bytes
SHA-256: 1ce767720595df0b0195f3550faf33e15d6107c4342528ba67db598ff5f77a27
font_01_sfnt_off00010cc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CC8 11000 bytes
SHA-256: 8b4b1687fe8a98ece64380319fb7b0d1a6a65f7cb04160d33f6ce384b01559b4
font_02_sfnt_off0001261c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1261C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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