Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e69a120349d1498…

MALICIOUS

PDF

94.9 KB Created: 2021-09-05 14:24:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: ef2c34d0bcd48edbcfc4cd5b9c2fc86c SHA-1: 91eb5ef1d789f1419a019b9fa5b9bcaadf794d91 SHA-256: 1e69a120349d1498a68bfdebea343809577972e4a5d31562058015e2b2ad0664
164 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous URLs pointing to compromised CMS upload directories and disposable hosting, suggesting it's part of a link farm designed to trick users into downloading further malicious content. The presence of a visual download button lure reinforces this phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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 http://jinanxintiandi.com/userfiles/files/10610529575.pdf In PDF document text
    • http://barsugo.com/ckfinder/userfiles/files/50538407249.pdfIn PDF document text
    • https://lostsoulsmemorialnj.org/wp-content/plugins/super-forms/uploads/php/files/d33cbf08355e9938968a61992356c99f/rawixujotow.pdfIn PDF document text
    • https://hafa-verein.de/wp-content/plugins/super-forms/uploads/php/files/5e718838b4515e6ea793b38e4419cb0e/76499412852.pdfIn PDF document text
    • https://tiguan-wiki.ru/file/tapewatimijipif.pdfIn PDF document text
    • http://www.linkkorea.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/160a3e62d515b5---98830947682.pdfIn PDF document text
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1607fc6fabc4aa---bopubitugamigajid.pdfIn PDF document text
    • http://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/161039d0fe9408---sevimuwolosif.pdfIn PDF document text
    • http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080eacdee4d3---42030963451.pdfIn PDF document text
    • http://popnmusic.fr/userfiles/file/lufimixo.pdfIn PDF document text
    • https://thefencedocumentary.com/adminfiles/file/gusidafok.pdfIn PDF document text
    • http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b700a0eea5c---37216921921.pdfIn PDF document text
    • https://udachi.co.th/wp-content/plugins/super-forms/uploads/php/files/fmscn4vte1373s3gvtl25o8vhk/wekuvoze.pdfIn PDF document text
    • https://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/1609df4aa155d5---65804405869.pdfIn PDF document text
    • http://usateatop.com/_upload/files/kotunajosuketediz.pdfIn PDF document text
    • https://www.oasipizza.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a2d084c2b79---9464090666.pdfIn PDF document text
    • https://numen-wow.com/userfiles/cloud//files/zilogitawotikezuwasavub.pdfIn PDF document text
    • http://www.veronicaneal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/160769d8226424---60894713571.pdfIn PDF document text
    • http://zpb-maciejewski.pl/upload/fck/file/16666502018.pdfIn PDF document text
    • https://event-connections.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609719df943fc---14196990041.pdfIn PDF document text
    • http://bona-agra.pl/Upload/file/xuxerifutedubur.pdfIn PDF document text
    • http://blueyee.com/upload/file/010106198049.pdfIn PDF document text
    • https://corpusbg.com/files/fck/file/magakix.pdfIn PDF document text
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c887b37107f---lujogejezekefilimom.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=tasheel+ul+mantiq+urdu+pdf+free+downloadPDF 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_off0000f887.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF887 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011099.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11099 27044 bytes
SHA-256: 16c2f2504535b4ccc492217ca1c249cde4aacf48090810ea8f6caedf917cf627
font_02_sfnt_off000153db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x153DB 11060 bytes
SHA-256: a189632e487c0c23461ba84539d74c2c6b5f7813a1702ad358a55b0346a818a2