Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8a72fc75ce28794…

MALICIOUS

PDF

107.5 KB Created: 2021-03-18 04:23:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 94e204588d53394f2f4d6b478cb84368 SHA-1: 5b79e537a750889519174ce384bf335b058a25a2 SHA-256: f8a72fc75ce28794d2bf32f897b2d45b9e55ed3883a7a0565af5a55e156a62f1
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 0.9996

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://maypoin.ru/123?utm_term=ios+camera+raw+format PDF link annotation
    • http://nilubalab.22web.org/62478016309.pdfIn PDF document text
    • https://cdn.sqhk.co/nibidawe/jt8HOhh/rewetorozupupuruxob.pdfIn PDF document text
    • https://cdn.sqhk.co/tisufupujeli/jghcggu/67676494371.pdfIn PDF document text
    • http://davupopebuwiser.sportsontheweb.net/zeripexav.pdfIn PDF document text
    • https://cdn.sqhk.co/ropobemuma/ayoiihi/texas_hold_em_poker_tournament_rules.pdfIn PDF document text
    • http://subumobo.22web.org/citadel_paint_conversion_guide.pdfIn PDF document text
    • http://lipuwisapi.mywebcommunity.org/acids_bases_and_salts_ncert.pdfIn PDF document text
    • http://kisizifavo.getenjoyment.net/jivogekodegurawaw.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/280fc52b-4b54-4e30-879f-07863eae66b5/sevuwonefuxeba.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f851624-7d46-4292-a42f-c367b4f2dcc0/eat_right_for_your_blood_type_a_cookbook.pdfIn PDF document text
    • http://vijixekezej.rf.gd/26213631475.pdfIn PDF document text
    • http://rigutogivopum.epizy.com/wapunubib.pdfIn PDF document text
    • http://nanugubodiw.epizy.com/74220484986.pdfIn PDF document text
    • https://1e6856c5-1481-42a3-8d1a-2a2567f9fa5a.filesusr.com/ugd/a8b033_918ac491ece94b358329e3a24e75b1ad.pdf?index=trueIn PDF document text
    • https://f421159b-d329-41e8-bc42-072bc93e4c50.filesusr.com/ugd/65d6f7_4a3ddb7759e0489cb3b215f1ca459b92.pdf?index=trueIn PDF document text
    • https://584dc5e1-4449-4bca-b3d9-d0e1fa08a972.filesusr.com/ugd/185caa_d28dc715d0a142b69aac73f71073dec7.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2cc0102-b2b0-4f12-9611-b0d58b5de395/firoganu.pdfIn PDF document text
    • https://858e1da1-ad31-4e5b-aec0-89c59c6c71f6.filesusr.com/ugd/6240f8_f3739b9124bc4583a32107118950307a.pdf?index=trueIn PDF document text
    • http://feridelej.epizy.com/ruwejasuzijez.pdfIn PDF document text
    • http://vinegufoxa.rf.gd/47044869162.pdfIn PDF document text
    • https://ac263381-fdad-4fda-ae78-6df6d71032d6.filesusr.com/ugd/25c42e_ea152d2968c5436ba478ddb1dbe9ab8d.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_off000167f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x167F3 5024 bytes
SHA-256: c86af62f679675f45a65730b6636aed8852f628a7b4e0af116e1c12d312e1c24
font_01_sfnt_off00017906.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17906 11552 bytes
SHA-256: b8d6d1c6de11f0d81abd6fa87a8a564f5db4be69d9d7a3759306e4438bc6b921

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