Malicious PDF — malware analysis report

Static analysis result for SHA-256 c15e2099a3226286…

MALICIOUS

PDF

112.8 KB Created: 2021-03-13 22:01:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: ad20a13c01192aec1ec3adee511cd2fc SHA-1: 9542e092e12b8ad0c6aaed1176482099cdff22e9 SHA-256: c15e2099a32262866972010f0eb58fd2b65ad8de5d37abb18c1b5ffe884b3e49
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://xajibur.ru/award?keyword=walter+benjamin+pdf+illuminations PDF link annotation
    • https://cdn.sqhk.co/misumirotoj/eTezCib/wedew.pdfIn PDF document text
    • https://guzokilib.weebly.com/uploads/1/3/2/7/132741743/5499312.pdfIn PDF document text
    • https://cdn.sqhk.co/mikedeto/cbigOhb/xatarataj.pdfIn PDF document text
    • https://dojiladise.weebly.com/uploads/1/3/1/3/131379401/4080911.pdfIn PDF document text
    • https://cdn.sqhk.co/rolileduvof/IjahbbR/review_buku_the_art_of_war_sun_tzu.pdfIn PDF document text
    • http://nadahul.ru/best_fantasy_books_for_young_adults_2020syo5s.pdfIn PDF document text
    • http://shop-you.xyz/2952579077tr51n.pdfIn PDF document text
    • 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://s3.amazonaws.com/ruzaganog/rivevedufiriregijumosorob.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7274aac-8514-4b0a-ab7b-78538f3fa8e1/how_to_use_midi_controller_ableton.pdfIn PDF document text
    • https://ed7c5604-ec0f-4ae6-9d22-6d534b57d154.filesusr.com/ugd/1d5a3f_afe5941059614fd6a1fec805de961659.pdf?index=trueIn PDF document text
    • https://7afcd0b8-98df-42a4-afe0-9544d44c9539.filesusr.com/ugd/74e9cf_d2a898d439134b5bb74905b8680cb843.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zuxime/57856201438.pdfIn PDF document text
    • https://s3.amazonaws.com/ginutu/firing_lawyer_letter_template.pdfIn PDF document text
    • https://s3.amazonaws.com/tosevud/new_sheets_in_spanish.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0de1eca9-1b49-490a-a55d-8b8419eb5b5e/83481938300.pdfIn PDF document text
    • https://7aff118d-26f6-4d76-9bc9-1838009e7274.filesusr.com/ugd/f80014_04edbfb67405430780a7708887cbe895.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zalomi/5959325203.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40d13146-e400-4b43-84b8-dc4db07f1b2d/magic_tree_house_movie_lionsgate.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_off00016913.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16913 5296 bytes
SHA-256: e19b7d2679e7479918af617ffbbf47853e6ba407dd4af9ad794523d906ad0821
font_01_sfnt_off00017b00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17B00 14096 bytes
SHA-256: 5ec3cdb305f34674948c4125cca178f996f04cfaa935f636b353d95e371172a8
font_02_sfnt_off0001a634.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A634 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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