Malicious PDF — malware analysis report

Static analysis result for SHA-256 45585529cd76b652…

MALICIOUS

PDF

86.9 KB Created: 2021-03-30 06:20:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 8e38bc71f6f3c18563b9a52553e77a08 SHA-1: aac7680b24d83a92b67eedea2fd96ff41f4b9abe SHA-256: 45585529cd76b652296b548cc71a74e7f0a913929dae8a643748371e57f1bd12
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9996

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://resalured.ru/award?keyword=my+aged+care+referral+form+pdf PDF link annotation
    • https://cdn.sqhk.co/xojelumegasi/4hjfMFm/smash_hit_meaning_in_gujarati.pdfIn PDF document text
    • https://cdn.sqhk.co/musutalivun/AiaUAgi/horse_racing_manager_mod_apk_download.pdfIn PDF document text
    • https://toredakiwireg.weebly.com/uploads/1/3/0/7/130739366/piwiva.pdfIn PDF document text
    • https://cdn.sqhk.co/jorisuzil/g5Mxmjd/6536868296.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415767/normal_6035a5e8c32cb.pdfIn PDF document text
    • http://ferategaj.scienceontheweb.net/tm-ac1900_firmware_2019.pdfIn PDF document text
    • https://vepodiruwa.weebly.com/uploads/1/3/4/3/134374194/2036164.pdfIn PDF document text
    • https://gogalafubixuvu.weebly.com/uploads/1/3/4/6/134642314/bfe0f859743f8.pdfIn PDF document text
    • http://vikolumubibo.scienceontheweb.net/43781770777.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501770/normal_60044f446f732.pdfIn PDF document text
    • http://safilow.iblogger.org/tipani.pdfIn PDF document text
    • http://dotekebenutedex.scienceontheweb.net/wivevupelikixitejasezegi.pdfIn PDF document text
    • https://feronodi.weebly.com/uploads/1/3/0/8/130813799/cb810cc6358d47.pdfIn PDF document text
    • https://cdn.sqhk.co/xuluriwu/Qja2r62/18725803636.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://similev.rf.gd/89926895219.pdfIn PDF document text
    • http://vinilobenodik.epizy.com/what_is_the_best_ccrn_study_guide.pdfIn PDF document text
    • http://tuludipetowizad.rf.gd/48421192501.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eabb99d2-7317-43c7-b194-dbdc81c3ec66/sonavoraloboladuleditin.pdfIn PDF document text
    • http://gejizejaniwijef.atwebpages.com/34965684016.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/98706a24-75ac-4d99-8b4e-5a81bb888ebd/mewapagudisanotafotalo.pdfIn PDF document text
    • http://pabovabavuwemet.rf.gd/19486538388.pdfIn PDF document text
    • http://kojenixerog.myartsonline.com/wigumasomiguka.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001162d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1162D 5404 bytes
SHA-256: 6af697043f43cca83c83fc1db1631db3535d01183ca1f43c4c8053aff60a54ad
font_01_sfnt_off00012897.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12897 11052 bytes
SHA-256: 0390f265cd991c103f44fee249e11da3cff2de3c3de327184ed419ca8280286d

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