Malicious PDF — malware analysis report

Static analysis result for SHA-256 92a76772e67933b1…

MALICIOUS

PDF

94.7 KB Created: 2021-06-27 23:48:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: f7c033b2fd6ac651bb3cf7b0be224147 SHA-1: 5ef8beba17e413b07b03125ab2e610c980bfc1c8 SHA-256: 92a76772e67933b1259ea5adffc90a57b83e7c0e486bf653ae3c905e18a24b44
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous links pointing to compromised WordPress upload directories, suggesting a link farm designed to host malicious content or redirect users to phishing sites. The presence of these links and the overall structure indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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 http://philippinesroadshow.com/wp-content/plugins/super-forms/uploads/php/files/fa861b8a805fcf93962cfb1033a03dab/35289742414.pdf In PDF document text
    • https://auf.vn/wp-content/plugins/super-forms/uploads/php/files/1taettsoo66mfpf98no7a193e6/28745690824.pdfIn PDF document text
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071ae3d626bd---pedal.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/rqjoaidqbn3jera5fp1r2qi7q6/50700846095.pdfIn PDF document text
    • https://donnasalon.ru/wp-content/plugins/super-forms/uploads/php/files/7b9253bf819f48bb77096bd1bc1d206c/83757539730.pdfIn PDF document text
    • http://micronforgacsolo.hu/UserFiles/file/64125565842.pdfIn PDF document text
    • https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2c69f79c43---kozas.pdfIn PDF document text
    • http://kimwendelldesign.com/ckfinder/userfiles/files/pusikiwiwi.pdfIn PDF document text
    • http://agcslohian.com/userfiles/file/11527815593.pdfIn PDF document text
    • http://cosmic-kino.ru/sadm_files/68396147645.pdfIn PDF document text
    • https://www.napariverinn.com/wp-content/plugins/super-forms/uploads/php/files/7f115b5d24ece2b424a6ddf8cd0fdf77/78028360390.pdfIn PDF document text
    • http://telekommarketing.com/firme_data/files/favoponilisifejuwafisu.pdfIn PDF document text
    • http://www.asslar.de/downloads/fokakisibekapegigel.pdfIn PDF document text
    • https://www.onestopnaturalstore.ca/wp-content/plugins/super-forms/uploads/php/files/0enisshfvhcgj5og679nrt2s77/metabobuvafi.pdfIn PDF document text
    • https://weddingitaly.jp/images/file/59958290177.pdfIn PDF document text
    • http://fotossc.pl/_files/file/17438430771.pdfIn PDF document text
    • https://carstenrath.com/wp-content/plugins/super-forms/uploads/php/files/nr0sa0gtamkp9alj14di5n3mc6/37388439122.pdfIn PDF document text
    • http://azstorestudio.com/uploads/files/dadon.pdfIn PDF document text
    • http://sake2metustin.com/uploads/files/23708063263.pdfIn PDF document text
    • https://marljivo.hr/userfiles/file/79489681052.pdfIn PDF document text
    • https://afd.me.uk/wp-content/plugins/super-forms/uploads/php/files/n65tb8ckt6rmvvn13vgg8ockmc/26220033677.pdfIn PDF document text
    • https://nscs.org/wp-content/plugins/super-forms/uploads/php/files/9b7b4f8f8289793bee1275b84ff9411b/37780699991.pdfIn PDF document text
    • https://gpagroup.in/wp-content/plugins/formcraft/file-upload/server/content/files/1609f8e555c637---48770036639.pdfIn PDF document text
    • https://www.kngroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080432c71fff---91391516790.pdfIn PDF document text
    • https://tripleccompanies.com/wp-content/plugins/super-forms/uploads/php/files/176a6345df2bc38a97d2adbda19ebb34/428077474.pdfIn PDF document text
    • http://ipjanah.ir/wp-content/plugins/super-forms/uploads/php/files/sd4mos1tt0qchpdov4rtosb6q2/raguz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=meaning+for+epicPDF 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_off00010e99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E99 10336 bytes
SHA-256: 521b9042d6f4fe9509fde56f2b4704a83c65d44c9e72d371561d57e82cdfb357
font_01_sfnt_off000125fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125FC 17568 bytes
SHA-256: 52454b62272315209eff9a509565f8ccc2301d5396914c9d6ad29b0df8aa9f24
font_02_sfnt_off000153cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x153CD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1