Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b029268070cec80…

MALICIOUS

PDF

78.0 KB Created: 2021-03-29 17:50:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dca1fbd34b578f252a5c3c0096f867bd SHA-1: 73fba61439117605d672c03b17bfde4e05f629bb SHA-256: 5b029268070cec80a757db9108cff9d5e5d6246239b1ff9b86f1c9e5c12d9c2c
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, suggesting it is part of a link farm designed to drive traffic to potentially harmful websites. The document body, though heavily obfuscated, contains references to 'wkhtmltopdf' and 'angular', possibly as a lure to attract unsuspecting users.

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://botokaw.ru/aws?utm_term=why+angular+is+best
    • https://manedubel.weebly.com/uploads/1/3/4/5/134587872/pojamej.pdf
    • http://nijaxubazaziw.mypressonline.com/cards_against_humanity_uk.pdf
    • https://mavitebe.weebly.com/uploads/1/3/1/1/131163983/jipetagoladani_forajodilexi_dubufexuzum.pdf
    • http://vodabutopidaru.getenjoyment.net/richard_ii_shakespeare_monologues.pdf
    • https://jazelisis.weebly.com/uploads/1/3/4/8/134870131/5c482116d.pdf
    • https://cdn.sqhk.co/kataregulu/jwga6dx/25984613889.pdf
    • http://lijamerogavex.iblogger.org/79057956719.pdf
    • https://bewarovawizijus.weebly.com/uploads/1/3/4/4/134454629/afa4ceaacdb.pdf
    • https://pubedazemel.weebly.com/uploads/1/3/4/8/134870130/gegonumuso.pdf
    • https://cdn.sqhk.co/xexerekija/gKidlig/download_game_ultra4_offroad_racing.pdf
    • http://kadesevi.iblogger.org/22700007496.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://dukizovisepo.rf.gd/wildgame_innovations_cloak_8mp_game_camera.pdf
    • https://s3.amazonaws.com/nevowimo/gst_calculator_india_for_windows_10.pdf
    • https://s3.amazonaws.com/sonutopexaramuf/vodigomusawidi.pdf
    • https://4f0754e2-f0c4-47db-826b-83042027646c.filesusr.com/ugd/7a11b0_2540c586fd784a3ba2fccd934b4b86c6.pdf?index=true
    • https://b7eb3c74-9f10-4efd-a612-efb7ea03662f.filesusr.com/ugd/7198c1_3b34b27252c94bfb96893a068fb04bf5.pdf?index=true
    • https://s3.amazonaws.com/bogeguva/al_arabiya_baina_yadaik.pdf
    • https://s3.amazonaws.com/gekojulog/operations_research_major_jobs.pdf
    • http://najorenowodume.epizy.com/mizesemesifekosizetetopi.pdf
    • https://5e20aa6b-77ef-4f11-9344-5454fb7c649c.filesusr.com/ugd/fb3aa9_c022806d42984b71ab66f6a6d10d1968.pdf?index=true
    • https://e0d0d77b-4c00-4265-bc22-f0cc5cf11ada.filesusr.com/ugd/957eb4_fed4a89a5e4d457d84e588603e0152cf.pdf?index=true
    • https://s3.amazonaws.com/vuliwisuwig/laropoz.pdf
    • 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_off0000f6a4.bin
cf98041f1ec14717147ddf6d1a74cebad4fa9dc23906156d84073a4ee5248856		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF6A4 5204 bytes
font_01_sfnt_off00010868.bin
696a4aa9b69ba3ad87b76ff3477f9bef6f8d6be571dd644807b1159df6d9c8a3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10868 10288 bytes

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