Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9e9d4bd37ceb913…

MALICIOUS

PDF

69.5 KB Created: 2021-02-20 01:55:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 7599df65ffd3b81d4b46101fd18cab1a SHA-1: df110e119b7c5d921e4febd9d2bf7a09ee7e6a03 SHA-256: b9e9d4bd37ceb913e296eae38a80affb9bb900e4331f5b2c7da8bb7f28b20f5a
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 0.9997

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://leonvi.ru/wix?keyword=airbus+mailing+address PDF link annotation
    • http://pl50off.info/miragomu82qhh.pdfIn PDF document text
    • http://fresh-ita.space/cube_testing_formulaqojja.pdfIn PDF document text
    • http://creditinquiry.info/67599092991dxbn.pdfIn PDF document text
    • http://nonretloli.site/2378574100h4kbz.pdfIn PDF document text
    • https://cdn.sqhk.co/tiruxugajo/GjjtVXk/lajumelikumopilekek.pdfIn PDF document text
    • https://cdn.sqhk.co/gepeduvo/7H3hgic/baby_nursery_rhymes_songs_playlist.pdfIn PDF document text
    • http://mishgen.com/leggett_and_platt_700_adjustable_base_manualxq9uk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415327/normal_600ce3f2335e2.pdfIn PDF document text
    • http://rte-ita.fun/divinity_original_sin_2_lame_des_ombwoxfe.pdfIn PDF document text
    • https://cdn.sqhk.co/dufukeraj/dAfyjjM/51973221686.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/tutasujal/davitagatupogifofu.pdfIn PDF document text
    • https://s3.amazonaws.com/pewibim/anime_planet_video_er.pdfIn PDF document text
    • https://s3.amazonaws.com/rebomedug/all_india_result_app_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/mupukesunobaga/arabian_stories.pdfIn PDF document text
    • https://s3.amazonaws.com/xufoxorog/50676128143.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_off0000d414.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD414 5276 bytes
SHA-256: 4bdf4c28b266d43e5a6bab0b4bdee41c799f503c54a113ea0f367490e7ffceb2
font_01_sfnt_off0000e5e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5E3 10412 bytes
SHA-256: 18f4e170731c21876abd31c8b4b552b227f905a8fcbe282d396432e74175f6f5

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