Malicious PDF — malware analysis report

Static analysis result for SHA-256 f58ba549f70bb35f…

MALICIOUS

PDF

79.7 KB Created: 2021-03-15 13:26:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 24d10cc43c9dd74f782f524c6c733fd1 SHA-1: df0d60ea3360ae4bfb7c645d03f49d4cbb868e50 SHA-256: f58ba549f70bb35f4a803ef795d2c6475a2f3c6a1686cf4cbe77021241f9eb18
126 Risk Score

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://jacksth.ru/wix?keyword=ffxiv+btn+leveling+guide PDF link annotation
    • https://cdn.sqhk.co/xixujipum/jgfLgdA/skiing_fred_apk_android_oyun_club.pdfIn PDF document text
    • http://itali-big.space/16270959799t6tkd.pdfIn PDF document text
    • http://lyudi23.ru/makikalulavixuwidivuxenashp7sm.pdfIn PDF document text
    • http://ludshop.xyz/jatum0p2fv.pdfIn PDF document text
    • https://cdn.sqhk.co/zutujodara/6gehfyz/descriptive_research_design_example.pdfIn PDF document text
    • http://logvoz.ru/lisemebonisejinirovupt6hru.pdfIn PDF document text
    • http://shoop-fn.ru/how_to_change_the_chime_on_adtt2rdf.pdfIn PDF document text
    • https://cdn.sqhk.co/wifopuzuxiba/aTxgiLJ/rise_of_kingdoms_best_commander_for_barbarians.pdfIn PDF document text
    • http://lnstagramsupportlives.com/losatikukozizobisebezol01i68.pdfIn PDF document text
    • http://mazers.fun/89873732711276p1.pdfIn PDF document text
    • http://ig-objectionform.com/dark_imperium_plague_war_epubzuria.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://05491ccc-77c7-428b-9c25-74f2c6c50d4a.filesusr.com/ugd/d51d36_612d63bf52ae4f66bb9edba89ed1f8bd.pdf?index=trueIn PDF document text
    • http://vekabun.myartsonline.com/taiwan_tourist_map.pdfIn PDF document text
    • https://s3.amazonaws.com/xalexojaxipud/pikifu.pdfIn PDF document text
    • http://gakilasefit.myartsonline.com/aristotle_nicomachean_ethics_book_2_chapter_1.pdfIn PDF document text
    • http://wiloradakuno.onlinewebshop.net/american_ways_of_life.pdfIn PDF document text
    • https://s3.amazonaws.com/vobuturinivi/regepazawuru.pdfIn PDF document text
    • https://bc732cde-fb09-4fee-8ab5-c82a45a1131b.filesusr.com/ugd/2ac701_c59727af92264aa9b925b27aaa790ada.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_off0000fc37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC37 4812 bytes
SHA-256: 1398be28fc1cbd92aa9e4e343b998c2101661a51ae34b916fdafa7bfd674931f
font_01_sfnt_off00010cc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CC1 10848 bytes
SHA-256: 8cd12fd8dc90d76f04e151c801de421f31190a42fbb26f2f0dfc26ad24ed3a8c

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