Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2027049cda2df6f…

MALICIOUS

PDF

83.4 KB Created: 2021-06-25 18:25:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 37a87d48bcc34ef69c9d68feba8c3c66 SHA-1: d571e846f0c2887d477216242171183910617060 SHA-256: f2027049cda2df6f535b7bebcfa9272a5141a85ba4fc665462c6d3b25304f098
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The document contains a large number of embedded URLs, many of which point to compromised WordPress upload directories or disposable hosting, suggesting a phishing or malware distribution scheme. The presence of these links indicates an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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.
  • 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://irlanc.ru/uplcv?utm_term=brown+colored+urine
    • http://littlepearlspublishing.in/data/eimages/file/2123533541.pdf
    • http://www.motorradfreunde-toggenburg.ch/up/files/jiloda.pdf
    • https://velvetskin.pl/wp-content/plugins/super-forms/uploads/php/files/aeabef2e675ff0445a73ad01fed450fb/wolirudalodetepenuzepelo.pdf
    • http://tms-operation.com/upload/files/vafoxutilifowu.pdf
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/160aa3d42b7b83---96120785311.pdf
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7f09cefb6---44114116388.pdf
    • https://bloomlight.pl/_bloom/file/xaxufa.pdf
    • https://egyptsuntours.com/userfiles/files/xewewerozoxebijuti.pdf
    • http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/160758f5548622---30374951045.pdf
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3f7a58e6aa---gusozatepebuje.pdf
    • https://asiaviews.org/wp-content/plugins/super-forms/uploads/php/files/1clr49isji1g7lkeihu7i83d16/muvusaseletomeditiniziza.pdf
    • http://fullx.net/files/47597656188.pdf
    • http://podiummoda.ru/userfiles/file/74840186339.pdf
    • https://thedestinbeachhouses.com/wp-content/plugins/super-forms/uploads/php/files/f400778fbaf5f50db8a941d199c1969c/64535765215.pdf
    • http://www.julitolaschools.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af743b3ddf4---5928557989.pdf
    • https://emauto.lv/index/images/up/file/gazekuvex.pdf
    • https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cb53d00258---someluwezemeterexoti.pdf
    • https://www.servicioscalibrados.com/wp-content/plugins/super-forms/uploads/php/files/2d5047d01fca6c302b4cebde9a9993f3/xerit.pdf
    • https://juegosinflablesarizona.com/files/97746130016.pdf
    • https://gz-topstar.com/wp-content/plugins/super-forms/uploads/php/files/a138e90dad45f95775499b866734e504/45156981163.pdf
    • https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/160a79d66942bb---tosomoninime.pdf
    • http://szentdorottyapatika.hu/files/58124409615.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_off0000e842.bin
265a1a1ae30f7d76b9f729f74fe0051b5a3a368bf7c435b2bdf0295606c0191a
pdf-font-stream PDF embedded font (sfnt) at offset 0xE842 10172 bytes
font_01_sfnt_off0000ff21.bin
4227ff2b3b05f34ee76850fb436bed37b610c8c4663b6a4f732f819646fac80d
pdf-font-stream PDF embedded font (sfnt) at offset 0xFF21 16140 bytes
font_02_sfnt_off000128b6.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x128B6 16792 bytes