Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ec66dbad57c2609…

MALICIOUS

PDF

74.2 KB Created: 2021-03-06 08:36:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 895e866bcecf91a61bf012a493796ca7 SHA-1: 9fce247989c04b44a96348ec7708208626d8fd0d SHA-256: 9ec66dbad57c2609a57f1e7e730ef35e0b684fc5be38d58d91b6d02fbb96671a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains a large number of external links, suggesting a link farm or SEO manipulation tactic. The primary URL, https://dafemum.ru/123?utm_term=coleman+lantern+17b+specs, is a key indicator of the malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://dafemum.ru/123?utm_term=coleman+lantern+17b+specs
    • https://wojuguzibuliru.weebly.com/uploads/1/3/4/8/134896427/wopubiviwaginizow.pdf
    • https://cdn-cms.f-static.net/uploads/4371025/normal_6022ae8964338.pdf
    • https://boxatikavizag.weebly.com/uploads/1/3/4/6/134680825/kiwukuxegug-puzufikuzek.pdf
    • https://static.s123-cdn-static.com/uploads/4391605/normal_5feb6ba12cfd1.pdf
    • http://gumidaz.medianewsonline.com/fadupasu.pdf
    • http://sevagawos.getenjoyment.net/impact_of_globalization_on_business_ethics.pdf
    • https://cdn-cms.f-static.net/uploads/4479905/normal_60321896394d1.pdf
    • https://ludalobupum.weebly.com/uploads/1/3/4/5/134528654/vafepu.pdf
    • http://mevakimuvu.mypressonline.com/wizudeluw.pdf
    • https://gazotudigexeb.weebly.com/uploads/1/3/1/1/131164446/3345f49385c462e.pdf
    • http://birebap.scienceontheweb.net/zedofovifijujoxiwemotedok.pdf
    • https://static.s123-cdn-static.com/uploads/4451365/normal_5fe185f998135.pdf
    • http://mogimetekojubar.scienceontheweb.net/is_there_a_fios_app_for_apple_tv.pdf
    • https://wizitizisib.weebly.com/uploads/1/3/4/3/134361222/2300972.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://tulifal.onlinewebshop.net/shark_professional_lift_away_steam_mop_not_steaming.pdf
    • https://eb72eaa1-ef55-40a3-a653-f6d21bccf295.filesusr.com/ugd/54913d_7f6ee30ef917490a876a4f110e0fe0d2.pdf?index=true
    • http://tipokeviti.atwebpages.com/is_killing_me_softly_on_netflix_uk.pdf
    • https://af1bea64-f5cd-41c2-a7c1-97f21c1aa057.filesusr.com/ugd/592671_0c8f142a8fda4da9a2314c431d3abe82.pdf?index=true
    • https://uploads.strikinglycdn.com/files/f12e6e2b-926e-4439-8feb-20b102c98a4f/grade_2_english_worksheets_free_download.pdf
    • https://uploads.strikinglycdn.com/files/434d6ada-25b9-4b12-8d0e-013ae73e5e9b/1430104524.pdf
    • http://guxejusoselota.myartsonline.com/30122749345.pdf
    • https://6478d21b-237c-41b5-add8-96d7b9819624.filesusr.com/ugd/c7ef1a_a9b2939c41b94d6cb6df310eeb423181.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e6c5.bin
da9fa4201d308de4119bb4bf88bac333c4fcedb0ef2777b604e3a21eacba5adb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE6C5 5256 bytes
font_01_sfnt_off0000f887.bin
9cff21d0a86621694e30e628f3010d9f9fdeb5588d547c907454eb3a43cf9e78		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF887 10260 bytes

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