Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd20bfab3dfc0b4e…

MALICIOUS

PDF

87.3 KB Created: 2021-04-02 18:43:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: f754166f165a0c7c271f27b14b43e775 SHA-1: 713572e9b85a1db7ece191d8ec9d906bc1a57c48 SHA-256: bd20bfab3dfc0b4e25d632543e5d9566a54d9ec532251c98604c1b8cacea83ad
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 0.9998

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
  • 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://xajibur.ru/strik?utm_term=kidde+kn-coeg-3+recall PDF link annotation
    • http://nuzadovokebin.iblogger.org/low_brightness_app_free.pdfIn PDF document text
    • http://pidawiwosoda.iblogger.org/19039526159.pdfIn PDF document text
    • http://fabujisaw.mygamesonline.org/illustrator_reduce_size.pdfIn PDF document text
    • http://mavedelusudefiv.22web.org/astronomy_magazine_free.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nerokigonone.rf.gd/physics_homework_answers_free.pdfIn PDF document text
    • http://nixipujulonitin.epizy.com/wapekasajaretujewodove.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe6eb055-100a-4959-9ef5-dfc85ae3e258/8620985600.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d29d63d-c4ed-4b31-abee-f75142028ad6/how_to_learn_photoshop_reddit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8769cefe-c0f9-42e4-b2b5-b41d9ae7daca/how_to_hook_up_wally_receiver.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/847c1d85-0697-466d-aaf0-5f36c659549d/audio_drivers_windows_7_64_bit.pdfIn PDF document text
    • http://pepiretivixu.epizy.com/46656212996.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e829ec06-01db-4619-af0b-5cb2f00ebe6e/dell_xps_8500_motherboard_drivers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b2c58a7-4582-4c96-a3d0-a17f539e2fe6/mifewiduxanebezata.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7189f872-f2b4-40ba-bc60-7d32ac7cafdb/dazovuxosunaniguwafejoken.pdfIn PDF document text
    • http://midabufab.rf.gd/96246250320.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba69feb6-aeb0-49ac-b2a1-22d6e5453de9/tunefikozuxobarurofobima.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7c43df3-3374-4f10-b644-79ecf0efac40/stock_market_game_app_reddit.pdfIn PDF document text
    • http://piwolimosopobu.myartsonline.com/tekuguvidaguxafejezedegu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a169be5-8c76-4585-8f6b-ff26b229e3c9/sasexebowasametizuwi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4bc43ba4-c718-4410-a4f3-5a48d5b5c8dd/zidilesazatolemadap.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_off00011656.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11656 5156 bytes
SHA-256: a40d740eb8a60e2d6bc72138e31b6ae4ea3fdbe2ae033ea9d342324fc9747645
font_01_sfnt_off000127f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127F8 11852 bytes
SHA-256: 1ba601381a1ad8d1fca8095477f2cde9fc01950e82047e2f9e16ecf9e7bde8ee

Open this report in the interactive analyzer, or submit your own file for analysis.