Malicious PDF — malware analysis report

Static analysis result for SHA-256 fee0bd12b7ef2170…

MALICIOUS

PDF

82.1 KB Created: 2021-05-01 19:30:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 903b8cabd1a6e57ebb872f53555b650a SHA-1: 7856930bbd69909a7e809b4f5a10a2ef0abb3d8d SHA-256: fee0bd12b7ef21700d783bdb32fb4880d0e51a52dc08f55a9f052ba2046a6d42
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 0.9964

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://jacksth.ru/strik?utm_term=international+durastar+4300+service+manual PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4426676/normal_5fde11b79a24c.pdfIn PDF document text
    • https://cdn.sqhk.co/jotapepikota/YJahjji/flick_kick_football_legends_mod.pdfIn PDF document text
    • https://cdn.sqhk.co/mibuxedufexi/jivhc3V/usa_facts_and_statistics.pdfIn PDF document text
    • https://cdn.sqhk.co/zizaratijiga/ZtjajhO/baxepipen.pdfIn PDF document text
    • https://cdn.sqhk.co/soziwariru/jIbTQJM/32669347778.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447250/normal_6045c3ee2b3c3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391599/normal_5fd9e0976c413.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368747/normal_5fd38e1e7340d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446263/normal_601b9a7cda72a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/baxekojojexusol/21161913263.pdfIn PDF document text
    • https://1160a196-6e18-49bd-931c-438029629b47.filesusr.com/ugd/40338c_d6480416acaa4a439277dd6b334e6b92.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b072a9c-b3d0-4526-bb40-792ae1a3dcb0/hp_12c_calculator_decimal_places.pdfIn PDF document text
    • https://s3.amazonaws.com/fedojigudaj/xedurijiwetug.pdfIn PDF document text
    • https://fa53e508-d88d-41cb-897c-7a5b6f1bfcc3.filesusr.com/ugd/361045_b6a2a9a3f77f42c2b5bb146e0125ee24.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/roware/a_k_letter_love_images.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc7e7865-7df4-44bc-8da1-4b104936f0fc/nududanizore.pdfIn PDF document text
    • https://s3.amazonaws.com/mojivikapeti/wallpaper_photo_jio_phone.pdfIn PDF document text
    • https://4d75d3c9-3a4d-4df6-84ab-e48b83d723e5.filesusr.com/ugd/cdb50c_bd52da721c89416da9a111b5fe64d46f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xilasisefi/visio_software_architecture_diagram_template.pdfIn PDF document text
    • https://s3.amazonaws.com/tokudapele/ukulele_songs_for_beginners_chords.pdfIn PDF document text
    • https://s3.amazonaws.com/tarizirefevifab/orari_saf_campoformido_udine.pdfIn PDF document text
    • https://b5b764bc-4fc6-48d7-9a4b-423a4d05f225.filesusr.com/ugd/3f2390_3b5905066cbe4a3a8554e53402c9f6f0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/babetafaperaxov/namo_app_information.pdfIn PDF document text
    • https://s3.amazonaws.com/bifadiwuwileji/an_english_irregular_verbs_list__free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3224023-071a-4afe-9ffd-3356be346897/datumo.pdfIn PDF document text
    • https://s3.amazonaws.com/zedudo/73822550879.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02c984e7-19bb-4eb9-84bc-96fe75668366/what_is_a_civil_process_server.pdfIn PDF document text
    • https://995be609-08d3-41b1-a6c0-90e53670bcec.filesusr.com/ugd/9988e1_c5bd0dace03c4f0b98aed718b7a7fe8f.pdf?index=trueIn 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_off00010376.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10376 5476 bytes
SHA-256: 45005309bbdea4547f4ea16fedccef1d26570746f22eaf5fe085e4cb25f5e731
font_01_sfnt_off0001160a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1160A 10896 bytes
SHA-256: 1cd53e020d6af4cd477926d76b8e8b07a93389b13d83410d0ae50930f0ae4037

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