Malicious PDF — malware analysis report

Static analysis result for SHA-256 5cff60e917df3c03…

MALICIOUS

PDF

85.7 KB Created: 2021-08-16 05:31:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: ab8d175b82a67375da784c449267faf3 SHA-1: 0697387f73629fda665a2b19d67c734b88cb6a85 SHA-256: 5cff60e917df3c03023578f3fac63b82f2fdfe455ac05f6c74bd360f37d39217
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links pointing to compromised WordPress upload directories and disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The presence of embedded URLs and the nature of the heuristics indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://lynnesnaturaltreats.com.au/wp-content/plugins/super-forms/uploads/php/files/6596ffb02d71267abca8a7f4b99546d2/bomovimetutomekutiju.pdf In PDF document text
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607e613088251---89967356801.pdfIn PDF document text
    • https://feriaesotericadeatocha.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607725e4cd485---81477789804.pdfIn PDF document text
    • https://floridaholidayplanner.com/wp-content/plugins/super-forms/uploads/php/files/080b373859bfed7fb4ac5330faeed1f4/kivexotapuvanonofoz.pdfIn PDF document text
    • http://fonnepal.org/userfiles/file/duzudiketel.pdfIn PDF document text
    • https://maugli24.ru/wp-content/plugins/super-forms/uploads/php/files/ef31ad8e8c9318ad0595bf452ada3bb6/1283828898.pdfIn PDF document text
    • https://roadtoring.com/wp-content/plugins/super-forms/uploads/php/files/4923391278f57254accd22a9403c8bf3/fusujupe.pdfIn PDF document text
    • https://salubrismd.com/wp-content/plugins/super-forms/uploads/php/files/e745d98af961f6e49212111e596e6b68/guvabenisanototegipafogo.pdfIn PDF document text
    • http://altaprecision.com/userfiles/file/49275817264.pdfIn PDF document text
    • http://htcable.cn/d/files/65920600146.pdfIn PDF document text
    • http://goldnumber.info/userfiles/file/78451689093.pdfIn PDF document text
    • https://diversifiedhumansolutions.com/wp-content/plugins/super-forms/uploads/php/files/c1e17a0070c0f9b2b0af1308e42d4a99/67690844074.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/cde9c98938b67cc3d3ec1dd944bc5cd4/40191469829.pdfIn PDF document text
    • http://guitarenko.fr/img/files/6510054522.pdfIn PDF document text
    • https://fanaf.com/article_ressources/file/rabig.pdfIn PDF document text
    • http://michelesherrinlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/58699988831.pdfIn PDF document text
    • http://autoset66.ru/admin/ckfinder/userfiles/files/wedenifaxoguwe.pdfIn PDF document text
    • https://weddingitaly.jp/images/file/valinabopadabix.pdfIn PDF document text
    • http://anandtouristcorporation.com/uploads/38304865221.pdfIn PDF document text
    • http://pc-driver.ru/userfiles/files/71764252829.pdfIn PDF document text
    • https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/d3cb2169b1e34f3d572ad52dbe60343c/ligijagufibabitofi.pdfIn PDF document text
    • http://teacherandtraining.com/coj_u/KK/userfiles/files/60577821574.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=how+do+i+remove+a+netflix+account+from+my+samsung+tvPDF 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_off0000e876.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE876 17536 bytes
SHA-256: 3363985c2cae2edd342f6c28cc6a6d248f1ad1a7e9bd53c40451ecad40588984
font_01_sfnt_off000115ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115EF 11280 bytes
SHA-256: 6182947e027cc544e33bd6b7e5301697e261d48d7d460e0c10e54e29d4f9a192
font_02_sfnt_off00013043.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13043 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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