Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f2d339eadee17f4…

MALICIOUS

PDF

86.4 KB Created: 2021-07-08 05:44:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 7d1a43af0c8095e83dff4bd32b8fd8b5 SHA-1: 8efd1d02b8d71ff201a99c8f46a8432b7ade5e3b SHA-256: 0f2d339eadee17f4377bcd6c9b45a22a72b3a848e3cea789f9ba0e7bb80c6dfb
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains a link farm pointing to compromised WordPress sites, suggesting an attempt to redirect users to malicious content. The presence of a 'download' button lure further supports a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://asaptransfers.co.uk/wp-content/plugins/super-forms/uploads/php/files/1pgh19bv9v33ltlfkfcr70vkg3/11542770334.pdf In PDF document text
    • https://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/60ec612f152384c611d7e91250c13d73/rowavawefivowaxizemizuke.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/5df7ba9b534ea323ea1d7d6f77c6a402/sosulona.pdfIn PDF document text
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d5f292b21e---63999286470.pdfIn PDF document text
    • http://rollfactorytogo.com/uploads/files/39378393502.pdfIn PDF document text
    • https://advantagelic.com/singhania/downloads/file/14624949821.pdfIn PDF document text
    • http://kondicionery-ivanteevka.ru/upload_picture/file/pidisevotibonigelubotaru.pdfIn PDF document text
    • http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/16094585a11cfe---salexatinoniwamemogo.pdfIn PDF document text
    • https://incoyun.com/calisma2/files/uploads/kixejepodotomanomopo.pdfIn PDF document text
    • https://moto-trend.cz/public/files/fck/file/28280065485.pdfIn PDF document text
    • http://brothersaluminium.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/160bc85e400468---tapina.pdfIn PDF document text
    • https://leesman.com/wp-content/plugins/super-forms/uploads/php/files/bebc343c452c92d1f8d53634d6212ca5/nosugojanevofokakow.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/b127ff6b107685ed6fcaf4d3ccc85f75/1913399671.pdfIn PDF document text
    • http://eurekaelearning.com/upload/news/file/12080849184.pdfIn PDF document text
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c142cff01c8---8194678154.pdfIn PDF document text
    • http://unsersohn.ch/images/file/96836746937.pdfIn PDF document text
    • https://www.conkite.com/wp-content/plugins/super-forms/uploads/php/files/f36072799b4b68d8230e37e54d31546b/25851619924.pdfIn PDF document text
    • http://thanuyentea.com/ckfinder/userfiles/files/dizinozox.pdfIn PDF document text
    • https://bettenbaehren.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bc60a37eb95---40771322990.pdfIn PDF document text
    • http://kientrucnhacuagio.com/upload/files/vediladojodazemuko.pdfIn PDF document text
    • http://dxqzx.com/ckfinder/userfiles/files/20210708_073950.pdfIn PDF document text
    • http://driver-jazda.pl/upload/file/kumisaditufixun.pdfIn PDF document text
    • http://gwhs79.com/clients/867100/File/17583567665.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=cooking+madness+mod+apkPDF link annotation
    • 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e707.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE707 10616 bytes
SHA-256: c7687bd4e712d84b4750baf1dbf7d5e05a121bfa1f8634042b061499d7c05965
font_01_sfnt_off0000ff13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF13 20136 bytes
SHA-256: 419ce5577fc401c1dc2df67eac9b3be08d543ba0ede0e4eff0a1d2295046ab13
font_02_sfnt_off0001329f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1329F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1