Malicious PDF — malware analysis report

Static analysis result for SHA-256 c56084101b4bd5d4…

MALICIOUS

PDF

74.1 KB Created: 2021-03-09 17:48:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 334e477d92dd8bfe4898e510b42b51a7 SHA-1: 8588ca67e849c7c744d562ffaf5a77301588faa3 SHA-256: c56084101b4bd5d409deece7ec3f2d821828acb8d317b9f9143c71b68d4795fc
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 0.9991

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://vilenefex.ru/123?utm_term=commando+game++utorrent PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4407810/normal_6035845521d2e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485448/normal_600a29a5a4a0b.pdfIn PDF document text
    • https://cdn.sqhk.co/sosobita/7yOge5Y/luvineradafekov.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473049/normal_5fe4dba149e76.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422631/normal_6017850366917.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370547/normal_6011702546875.pdfIn PDF document text
    • http://jowakemanek.iblogger.org/54538061949.pdfIn PDF document text
    • https://cdn.sqhk.co/sopaluwokaja/iajb9jc/fruit_king_on_ayers.pdfIn PDF document text
    • https://cdn.sqhk.co/ramazunor/w6dxjeE/live_gamer_tv.pdfIn PDF document text
    • https://cdn.sqhk.co/votiwixuduzo/jajaSge/increase_screen_timeout_mac.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/479e1a45-efff-46fc-8c80-562eef464c34/pidejima.pdfIn PDF document text
    • https://s3.amazonaws.com/dugibabafod/44091615877.pdfIn PDF document text
    • https://s3.amazonaws.com/metubevozisul/media_player_classic_2018.pdfIn PDF document text
    • http://kotonilo.epizy.com/51659980217.pdfIn PDF document text
    • http://falalafazod.rf.gd/what_is_the_purpose_of_using_a_chemical_equation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d508ce98-4567-4395-a18c-c6152f283378/definicion_de_primeros_auxilios_psicologicos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c37fd8f-10ae-49a9-94bc-0045d65fb7d5/wuzekasagetuzetixi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3cb911fc-86be-4f21-9dcb-956d9cbea38b/the_rsi_swing_trading_strategy_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49ac2550-1cbb-4b31-9653-aebe3e979093/dir-655_firmware_hack.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a9f0f7b-c9c7-4423-a400-285b047c1bda/92480646985.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37f7e098-4793-4dc5-930a-37764505a1cc/tarot_spread_finding_love.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/153afd13-d7cb-4cae-9d52-4a216b9bfb8a/vimukedijowakonesovax.pdfIn PDF document text
    • http://fipizojuj.rf.gd/20242858954.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwuzerijofa/16404875713.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b56d2fa-35bc-43c4-8b6f-2cf34128aa6a/91861288179.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_off0000e5bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5BC 4840 bytes
SHA-256: 0119fca50e0ea530792e293bc9568a22ebe3051b4e948094a6de0fd2677dac69
font_01_sfnt_off0000f614.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF614 10712 bytes
SHA-256: fcd4cf6bc7aec3fb5b0320edd9940f1aacfaad6376458f2e18aa737b13bcfaec

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