Malicious PDF — malware analysis report

Static analysis result for SHA-256 65d8ad1006912232…

MALICIOUS

PDF

77.3 KB Created: 2021-03-22 09:02:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: fcb4087b95896fa9849d0d60fd4d2682 SHA-1: 1cfd479c7e4e2590ffee0b25cfeca5559b3ca51e SHA-256: 65d8ad10069122327835382eae0f93f7709c8703dd33411b07a3062a7fcac79d
166 Risk Score

Malware Insights

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

The PDF contains multiple external URLs, with one specifically identified as a potential lure for downloading content. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' indicates the document likely instructs the user to decrypt an archive, a common tactic for bypassing gateway security. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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=vertical+integration+and+corporate+strategy+pdf PDF link annotation
    • http://edaeda.moscow/ziraxezozobeturigagovog9mwr7.pdfIn PDF document text
    • http://toolsbestpricemicrometer.site/how_to_trade_bitcoin_youtube2vin4.pdfIn PDF document text
    • https://cdn.sqhk.co/ritasuxa/guOggfy/sathi_bengali_movie_song_free.pdfIn PDF document text
    • http://kudretbozaci.com/battle_angel_alita_last_order_wikipedial2q9a.pdfIn PDF document text
    • http://thailandlove.site/board_games_for_4_year_olds_australiarovav.pdfIn PDF document text
    • http://xviiivbgz.com/vevalu1h1v7.pdfIn PDF document text
    • https://cdn.sqhk.co/pofifarim/jfzigWo/vpn_private_app_for_android.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://ff102949-4c65-4b7b-925c-ea9a98d885fa.filesusr.com/ugd/7a16bb_42961c52dec348ecbcd05f381a19e2bd.pdf?index=trueIn PDF document text
    • https://b4e79a3f-0083-4b26-8056-4fe87fb46dfd.filesusr.com/ugd/332c1b_66cd6e2b308e4e43879ef6097f0578ab.pdf?index=trueIn PDF document text
    • https://eb62986f-0112-409a-9ebe-777412bc5c19.filesusr.com/ugd/26938b_f1bf003088274a4da87303889e4b1181.pdf?index=trueIn PDF document text
    • https://7b4e975e-109f-4397-a679-93e438ff1453.filesusr.com/ugd/c33f71_0c100baf36cb4ec69a5b84b2645d4c77.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/15406417-f2be-4a7a-82f8-54e15a7d6d84/pinagenaw.pdfIn PDF document text
    • https://ec2d952e-5494-46d8-b841-fee222248b17.filesusr.com/ugd/9713d5_d4a9cb4abd3d474884d43f7fa0b09a8d.pdf?index=trueIn PDF document text
    • https://882e4f53-a7e1-4d4a-89e8-a6e6d9f9b805.filesusr.com/ugd/9a13d2_98b341f3c503431d8343c85e6173cef6.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/328e49c8-a916-4e75-854c-15c7ee380c2b/44091516085.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ecf2a9f0-5573-4739-8b2e-ce835816d49a/15762856055.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08cc5562-269f-42d6-b757-61807d22d117/how_to_evaluate_strategic_planning_process.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_off0000efde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFDE 5392 bytes
SHA-256: ed6faa9c74b8c4f137475c9b842e8b964d42bdd60d4e536c7caf78485137fd7b
font_01_sfnt_off0001024d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1024D 11156 bytes
SHA-256: 871cad78c00bf73c1a53bad9fe017da1a6d9f655d54b8e05fb84db2eadc56ff0

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