Malicious PDF — malware analysis report

Static analysis result for SHA-256 e262d4e7a63e2dea…

MALICIOUS

PDF

97.7 KB Created: 2021-03-22 12:24:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 05d311b60ec44c1b5e4b12273edc5aa6 SHA-1: 2a43fdadb604bb74fb47f7f5523d6c6e53cd79d7 SHA-256: e262d4e7a63e2deab78a306d821233be53e5b3e90147d9eda2f0835db2b1b023
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://resalured.ru/123?utm_term=verified+answer+to+complaint+federal+court PDF link annotation
    • https://cdn.sqhk.co/sorubajuzoxe/gjjihev/tefaratamufetaxigapubi.pdfIn PDF document text
    • http://menbp.online/moonlight_helix_jump9pd0x.pdfIn PDF document text
    • http://komarovskii.xyz/50472669211nuau.pdfIn PDF document text
    • http://prolac.ru/inquisitor_martyr_guide6ay23.pdfIn PDF document text
    • http://ag-management.space/kepofifav4joau.pdfIn PDF document text
    • https://cdn.sqhk.co/furabafezuse/nmDXhe0/spaceflight_simulator_v1._3_apk_download.pdfIn PDF document text
    • https://cdn.sqhk.co/baxorurifina/hcia4jN/vunugemuwoneburazuv.pdfIn PDF document text
    • http://newsportstechnology.ru/knowledge_of_self_islamhtelk.pdfIn PDF document text
    • https://cdn.sqhk.co/kadukugobug/gdb4BL1/72959441382.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/wovigebi/index_match_excel_another_sheet.pdfIn PDF document text
    • https://f171294f-ed7a-4884-a773-1e826a512430.filesusr.com/ugd/20d861_942bb80fb99b4933811834430d5f1adc.pdf?index=trueIn PDF document text
    • https://183df7f2-4185-4ca0-bfcc-33b39bc842f1.filesusr.com/ugd/9ac34a_ca6e2789b5334380a077a5f21e586e0d.pdf?index=trueIn PDF document text
    • https://8e0cabef-d481-4215-b437-8a5fc4e4723c.filesusr.com/ugd/f41140_38d011f51f6949f1b464578e7712bebf.pdf?index=trueIn PDF document text
    • https://2fe0a9f4-4d23-48c4-8711-d5fb25093877.filesusr.com/ugd/683a75_c2fd12f3d3414cb5984a3282eb524c26.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f71f8ff2-d5c5-4f56-acf7-4ba36cce6bfc/28241834445.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a294d061-c4ea-40a1-a396-c19d71e1b5e0/what_causes_a_whirlpool_dryer_to_squeak.pdfIn PDF document text
    • https://s3.amazonaws.com/xunilukegez/75649411828.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a3b4a4a-87c7-4c10-a7a6-216580d7392a/mazoze.pdfIn PDF document text
    • https://6ddb26ad-aa8e-4a3e-a925-5cef6fc035e1.filesusr.com/ugd/d3d820_770de4c300d3487f913bba0737feb6f7.pdf?index=trueIn 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_off0001419a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1419A 5360 bytes
SHA-256: 6dfb96a438d65077f72a3902c175c288d6830f10e9df60682ca9720b781f892e
font_01_sfnt_off000153d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x153D4 11060 bytes
SHA-256: fcd219959e36a14cb59014f9d78c6a5f48a944428852815240bc7bd9ae80e42e

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