Malicious PDF — malware analysis report

Static analysis result for SHA-256 7fce04a40b040efc…

MALICIOUS

PDF

77.0 KB Created: 2021-03-09 21:14:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 3d46857eabd37474b0c42da249ea9e87 SHA-1: 29777673dee29fdcce8a804255d7adcb1b561356 SHA-256: 7fce04a40b040efcb6089d90fb399cf6b2d76414f51e539cb72b94e51fbf38cf
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-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://mezovuduw.ru/wix?keyword=industrial+revolution+worksheets+6th+grade PDF link annotation
    • http://dreamingdeveloper.com/harry_potter_5th_book_release_dateyei9m.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403560/normal_601d0f5aa48ca.pdfIn PDF document text
    • http://miwopejodap.iblogger.org/vumovogegot.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474218/normal_60134c5dd4795.pdfIn PDF document text
    • http://online-sistem.site/oggi_in_italia_9th_edition_workbook_answer_keydddaa.pdfIn PDF document text
    • http://pihodze.com/surveying_and_levelling_n_n_basakvdeay.pdfIn PDF document text
    • https://cdn.sqhk.co/fuludasowipu/dtzAEHY/stumble_guys_multiplayer_royale_ios.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384461/normal_6005f31dee59e.pdfIn PDF document text
    • https://cdn.sqhk.co/danopefasuf/AheghMG/canon_camera_connect_app_for_windows_10.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://170a7d3c-74f0-42f5-9ead-98ae292a4922.filesusr.com/ugd/a18aa6_8f573e22c14d4ddaba1c10ef513f2783.pdf?index=trueIn PDF document text
    • https://da5bec28-7969-4117-8ffb-5069fce5e80c.filesusr.com/ugd/31593d_8a5d52e1e3c8475bb4433f85a0f4d9cb.pdf?index=trueIn PDF document text
    • http://vawerudarasikow.myartsonline.com/apex_academy_absolute_beginners_guide_to_coding_in_salesforce.pdfIn PDF document text
    • https://0dd4521b-3e41-4083-9bcc-807cce03ae78.filesusr.com/ugd/cfe2e9_1b3ca69e27124268928e17a941b1c2e8.pdf?index=trueIn PDF document text
    • http://rusozetowozo.epizy.com/atomic_structure_crossword_answer_key_science_teachers.pdfIn PDF document text
    • https://636e06b3-920c-4898-b827-ef778bbbc101.filesusr.com/ugd/40512e_4f627064d12a4c87959e35c3f16df713.pdf?index=trueIn PDF document text
    • http://ludugatitabi.atwebpages.com/83618999687.pdfIn PDF document text
    • http://vasedazixi.rf.gd/observe_and_report_rating.pdfIn PDF document text
    • http://bodegifu.atwebpages.com/tivoduwip.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_off0000f10b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF10B 5392 bytes
SHA-256: 806f28ff4259d39ab4e296343bfbe2be970afd57b57ffa9a5c0e19c75acbfece
font_01_sfnt_off00010373.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10373 10188 bytes
SHA-256: 0f110306fc98c70c47574b148a27cbafd28e54748d7b7671d98c63c351c05afa

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