Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc50f0e8bc302576…

MALICIOUS

PDF

83.6 KB Created: 2021-05-07 17:52:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 351d1dfd17c7f3bb4f53aa34e18fad7a SHA-1: 858a8e59459b23fe25c8f1128288fa3c3682af46 SHA-256: cc50f0e8bc30257605e4fd7af4204d29295d2fa490660b1e8dfff6879e3113c9
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-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://pelibifir.ru/strik?utm_term=how+to+deduct+books+from+taxes PDF link annotation
    • https://cdn.sqhk.co/modesarox/heDmeje/69116442458.pdfIn PDF document text
    • https://cdn.sqhk.co/mewovegid/idjcH6m/zatifupepetewow.pdfIn PDF document text
    • https://cdn.sqhk.co/lajawawinu/Jggogid/poremoderutuko.pdfIn PDF document text
    • https://cdn.sqhk.co/wepiwuvume/WicgWqG/mijn_simyo_account_aanmaken.pdfIn PDF document text
    • http://cozyplacefor.rest/15038727779irqzj.pdfIn PDF document text
    • https://cdn.sqhk.co/suxupijisajo/igf39Fl/lutudane.pdfIn PDF document text
    • http://lazerepil.site/9712185506875gfo.pdfIn PDF document text
    • http://lnstagramservicecopyrights.com/ubuntu_python_setup.py_uninstallrcb6a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/add9361c-3c83-414e-9acd-a336028de68a/who_waited_on_the_lord_in_the_bible.pdfIn PDF document text
    • https://e25b5f36-ee09-4010-8803-019b2853a23b.filesusr.com/ugd/c34eac_922ef6b6bd0b46a4b6a1828fd776e37e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xeropizuwe/how_to_ace_pa_school_interview.pdfIn PDF document text
    • https://da9d63b4-fbfd-4f6f-88e7-06ac0d76355b.filesusr.com/ugd/ca300b_8b672c3c404a41bd9410ac1be03f9b0e.pdf?index=trueIn PDF document text
    • https://bb491b24-4c81-4ccc-8daa-bf1baeb171c2.filesusr.com/ugd/93c935_82f519ed3301486cbb62f7211d294933.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/815752f3-180d-4cf6-b249-65c0ad2dfa73/toro_521_snowblower_auger_belt_replacement.pdfIn PDF document text
    • https://s3.amazonaws.com/wujapu/tiriseko.pdfIn PDF document text
    • https://s3.amazonaws.com/jepavilutabilel/soft_background_music_for_presentation.pdfIn PDF document text
    • https://s3.amazonaws.com/jukezeluf/91282046643.pdfIn PDF document text
    • https://84d5b3ab-51dd-4312-87b7-51df18fb3b26.filesusr.com/ugd/9ea9b6_6b8f5ef3e40b42bc963a9cb61515b3bd.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xupimaral/ford_explorer_2002_service_engine_soon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/468a14b8-c146-457e-a93a-0ee0c5b658de/how_to_google_search_a_picture_on_iphone.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c2cac40-8be6-42b0-8282-2bffe6f0a061/basic_english_grammar_fourth_edition_audio.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5a8a224-359a-4b18-8b4d-3576691e0e67/2234935506.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_off00010923.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10923 5460 bytes
SHA-256: 6a4263157524d846da0cc89e450a291e7b9fb65c4a28320e94e47b8e473c2f85
font_01_sfnt_off00011bb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BB1 10988 bytes
SHA-256: 630ceaace8b67bd87a33043dda7e526c7a8bd4ffa1a9091592b6befc6c5f1b9e

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