Malicious PDF — malware analysis report

Static analysis result for SHA-256 453ac28ee482ee2e…

MALICIOUS

PDF

349.0 KB Created: 2021-07-04 14:02:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 50a593a34c15d3e7399d11d894c95910 SHA-1: df511007c0206440face0bee71e971e3b54ff6c8 SHA-256: 453ac28ee482ee2e825a35b0881322ada62c574f61e7b315aa2efb6f4d3cf817
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The presence of numerous URLs, including those hosted on compromised WordPress sites, suggests a phishing or malware distribution campaign. The heuristic 'SE_URGENCY_LURE' further supports a phishing pretext, aiming to prompt immediate user action.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9778

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://garglob.ru/uplcv?utm_term=grunting+respiration+meaning
    • https://sardavetri.it/userfiles/file/laliwarawuwuj.pdf
    • http://bugaboo-buffalo.eu/UserFiles/File/gixek.pdf
    • https://www.vibrationmonitoring.asia/wp-content/plugins/formcraft/file-upload/server/content/files/1609a60bad7a53---simopadafiketivunutof.pdf
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16087344f345c0---25421067254.pdf
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608a2d844ec3b---26656469721.pdf
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/5e6b2f0e595b3cc3cf4f83a10d4f12d8/90781434209.pdf
    • https://rittenhousesmiles.com/wp-content/plugins/super-forms/uploads/php/files/fc6e6f3247d145f769cbf9b60e6939de/litonosixotuzun.pdf
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a65d654dae9---lupalopetixovim.pdf
    • http://mikailang.net/userfiles/file/20210530113421_536921716.pdf
    • http://huh.hu/UserFiles/File/jokarazipavezeguvuzozuxod.pdf
    • http://www.caribbeandentist.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c62f1985402---81531829430.pdf
    • https://mytekas.com/UserFiles/file/futonidobowomitum.pdf
    • http://puzynowska-kancelaria.com/userfiles/file/fomikosujafixokekamef.pdf
    • http://www.kidnuri.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070b9996dca6---diwoxadukurapu.pdf
    • http://paoladebenedetti.eu/userfiles/files/fimomudelewepudutevakiruv.pdf
    • http://acetuitioncentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609837b24369b---toteburuvubonikosuge.pdf
    • http://az4group.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160dbaa788d9e4---88328450393.pdf
    • http://kperrylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/dabuzemazuzika.pdf
    • http://nutranghongngoc.com/media/ftp/file/kezidawobukidideba.pdf
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160ba63c4e0e73---lusulujaduwadetenatigu.pdf
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/e4188fdff5f8c7e475a3ade8844fb353/43455510559.pdf
    • https://livredart.com/ckfinder/userfiles/files/gapoxanikuragivaz.pdf
    • http://chinalabware.ru/d/files/5850959738.pdf
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084b49b46389---vizifosoj.pdf
    • https://area5srl.it/file/tezuzejovikibabo.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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0005042a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x5042A 16792 bytes
font_01_sfnt_off00051c3c.bin
1ca7256d60438549dcd65b74a16948be0b606790f9115804cec744b146667991
pdf-font-stream PDF embedded font (sfnt) at offset 0x51C3C 18752 bytes
font_02_sfnt_off00054ca2.bin
cea2c9b88c639f309386447c881bd74d6e2e901ce0a4fdba5702077d5696c011
pdf-font-stream PDF embedded font (sfnt) at offset 0x54CA2 10688 bytes