Malicious PDF — malware analysis report

Static analysis result for SHA-256 0455e253d1deafb3…

MALICIOUS

PDF

89.7 KB Created: 2021-07-07 23:20:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: f29636f44783b8f08d53ac56d0f3277f SHA-1: ca313494c0f9eee6fcedc4727d3e4966e67d12fb SHA-256: 0455e253d1deafb3421a0a672964cb156a77bbf6d48c6a52a12edc41b22a9d78
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to multiple potentially compromised or malicious websites. The document body is unreadable, but the presence of numerous URLs, many hosted on compromised WordPress sites, strongly suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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 https://dimensioninteractive.com/WYSIWYGImage/file/xeluzajogebagipoja.pdf In PDF document text
    • http://lucann.com/Upload/file/77825245334.pdfIn PDF document text
    • http://ztkammer.at/uploads/file/pewuxunorudaroxiti.pdfIn PDF document text
    • http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/bc03527b826158e325a0950616c9459d/58238986304.pdfIn PDF document text
    • https://bonacorsi.it/file/17833783302.pdfIn PDF document text
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/16072ff42ccb43---41117548187.pdfIn PDF document text
    • https://smarttactic.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607ece853f034---54958875864.pdfIn PDF document text
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b2a781d2fd4---vugodabesuf.pdfIn PDF document text
    • http://aquatrustfina.com/userfiles/file/55564004219.pdfIn PDF document text
    • http://juentai.com/userfiles/files/76589053801.pdfIn PDF document text
    • http://zhhyhb.com/uploadfiles/files/90750609847.pdfIn PDF document text
    • http://travelport.pl/userfiles//file/13198479152.pdfIn PDF document text
    • http://alibabashipping.com/userfiles/file/95713902570.pdfIn PDF document text
    • http://angelcabrera.com/FCKfiles/file/zegapiwilut.pdfIn PDF document text
    • https://razdolle.by/wp-content/plugins/super-forms/uploads/php/files/au42sag4ireteui9fh7v22m666/vuwovesefelawojofe.pdfIn PDF document text
    • http://remaining-mc.de/userfiles/file/rorazaguwosawezifalud.pdfIn PDF document text
    • http://apsara.ru/userfiles/file/zumanefabojaxikaxotozawib.pdfIn PDF document text
    • https://www.travelticket.com.au/wp-content/plugins/super-forms/uploads/php/files/9fghqggh40b5rikg8ivrpucu3u/gokegapugul.pdfIn PDF document text
    • https://118highschool.am/wp-content/plugins/super-forms/uploads/php/files/2d56aa37731c50978f7d83b40b0d421e/pizunitemalezaza.pdfIn PDF document text
    • http://degrossier.nl/uploads/file/10470244763.pdfIn PDF document text
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c916deec2f5---lerikakamawika.pdfIn PDF document text
    • http://birons.net/wp-content/plugins/super-forms/uploads/php/files/f66c137b9071115ccf204c694601fcd4/91384275128.pdfIn PDF document text
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/160883fed356d5---petoropopepuzarun.pdfIn PDF document text
    • https://anzmrrn.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a9982b01ad9---lorotini.pdfIn PDF document text
    • http://arohitourandtravels.com/userfiles/file/savegirarudukota.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=how+to+get+clownfish+voice+changer+on+xboxPDF 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_off0000fac2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAC2 17200 bytes
SHA-256: cbf939823a727f6b6914f59937cbb920e8972ef8475cdfc38d2073d5f6e92f4b
font_01_sfnt_off00012778.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12778 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013f8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F8F 11000 bytes
SHA-256: e50637e61fa5bb4a79566959d969189e8c776dda13fa24ef383b5a39001db89d

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