Malicious PDF — malware analysis report

Static analysis result for SHA-256 72164ce660a5e588…

MALICIOUS

PDF

60.9 KB Created: 2021-09-24 17:17:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: be5545f5994e16fa75ed3b3f451d9e9d SHA-1: e9433a57f9b9527beaa8d0d7c3263e4a750f80ab SHA-256: 72164ce660a5e58825865a8a094d7491d993e2457b97d62953eb7aeb4c13afe1
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users. The presence of embedded JavaScript and ClamAV detection as 'Pdf.Phishing.Trojan' strongly suggests malicious intent, likely for phishing or distributing further malware. The document body is heavily obfuscated and appears to be generated by wkhtmltopdf, further obscuring its true purpose.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6177

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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 http://tataservice.it/userfiles/file/wulufanixebatido.pdf In PDF document text
    • https://podiummagazinenews.com/ckfinder/userfiles/files/wefuxozixisugoreragogul.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/7oia61end5obl4f0kojq9d7174/93111609168.pdfIn PDF document text
    • http://ankurgroups.com/userfiles/file/kefitasudaserotematir.pdfIn PDF document text
    • http://marquisdecor.com/userfiles/file/xixikakuwidedavawudi.pdfIn PDF document text
    • http://musik-fachberatung-neumarkt.de/images/uploadedimages/file/jelapipumozo.pdfIn PDF document text
    • http://alexlunacoach.com/img/editor/file/17693868795.pdfIn PDF document text
    • http://cungcapluonech.com/upload/files/72643918405.pdfIn PDF document text
    • https://www.koreayokogawa.com/ckfinder/userfiles/files/13190656531.pdfIn PDF document text
    • https://healthresearchinstitute.net/userfiles/file/60412574693.pdfIn PDF document text
    • http://finalstage.biz/js/upload/files/96112436522.pdfIn PDF document text
    • http://air-ned.com/uploads/files/duxifoxotoruj.pdfIn PDF document text
    • https://postelezmasivu-zlin.cz/ckfinder/userfiles/files/nepebelujesiz.pdfIn PDF document text
    • http://gazdalkodjokosan.hu/img/userfiles/file/23680291522.pdfIn PDF document text
    • https://samsungklima.net/upload/ckfinder/files/likedopi.pdfIn PDF document text
    • http://yarpb.ru/pic/userfile/lixok.pdfIn PDF document text
    • https://www.bocamvigliesrooms.com/wp-content/plugins/super-forms/uploads/php/files/c26d9fc7d8dbffd860ffc02c574b2bcf/61837509546.pdfIn PDF document text
    • http://basketaci.cz/UserFiles/File/13913015377.pdfIn PDF document text
    • https://patriot.ch/wp-content/plugins/super-forms/uploads/php/files/ndpvsmnds8hi9a8eabl3eb3ptc/kuger.pdfIn PDF document text
    • https://rkdestate.com/userfiles/file/27827476083.pdfIn PDF document text
    • https://tramhuonghanoi.vn/upload/files/mivuwumufatu.pdfIn PDF document text
    • https://iohrp.org/f_files/files/xoxiraxawopexetiwe.pdfIn PDF document text
    • http://dsraxys.com/uploads/botevanefewebomimaxud.pdfIn PDF document text
    • http://lotuscourtpune.com/wp-content/plugins/super-forms/uploads/php/files/1011eeac132bb2cbf0ec13d7e3a121d9/maporowepoputurobeki.pdfIn PDF document text
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614cbda3b1a72---mewuxejodejogoz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=toca+boca+hair+salon+3+apkPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c777.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC777 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000df8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF8E 10608 bytes
SHA-256: e0e3c2864a1a15180a923409a66e08897c7fc8dba99c37538476ba21b45e84e9

Open this report in the interactive analyzer, or submit your own file for analysis.