Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca1e69de03aeae52…

MALICIOUS

PDF

83.1 KB Created: 2021-09-01 19:27:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 6f04abfecf3139b4b003dc3ec6968df3 SHA-1: bebff30415e49325914ec91a99d51d57b9cfabe5 SHA-256: ca1e69de03aeae52331bae15998433a0f4e35f401a9bd45e9ce51d52d7bf2310
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The document contains numerous embedded URLs that point to various websites, many of which appear to be compromised WordPress installations or disposable hosting. These links likely serve to redirect users to phishing sites or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://crysiq.ru/uplcv?utm_term=rhyme+scheme+of+death+be+not+proud PDF link annotation
    • https://habibitours.net/ckfinder/userfiles/files/gijolakavufavaxilir.pdfIn PDF document text
    • http://cerezolorente.com/files/cerezolorente/_repo/file/bogoxewe.pdfIn PDF document text
    • https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/160db4ea423557---42811964064.pdfIn PDF document text
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5a24595fe7---3465238364.pdfIn PDF document text
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/160790befc3d6e---tuxasilubaf.pdfIn PDF document text
    • https://bwawarszawa.pl/upload/file/tabigibubogosumebenavuru.pdfIn PDF document text
    • http://xaydungphongphu.com/uploads/files/gonoxidirunirerajaxu.pdfIn PDF document text
    • http://omnoiptv.com/outscapes/admin/ckeditor/uploads/ck/files/ragopukev.pdfIn PDF document text
    • https://area34.info/wp-content/plugins/super-forms/uploads/php/files/47c4lq7pqm576i4j5lkrhrtlu0/23247268719.pdfIn PDF document text
    • http://teechart.com/uploads/images/files/terenobuzesejabopunogo.pdfIn PDF document text
    • https://bustotoronto.com/userfiles/file/55209904998.pdfIn PDF document text
    • https://roomart.uz/ckfinder/userfiles/files/xamolu.pdfIn PDF document text
    • https://torrentclub.vip/wp-content/plugins/super-forms/uploads/php/files/bgf603os5jh372mhm6osm4iiau/rejosokuzup.pdfIn PDF document text
    • http://queuemanagementsystems.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612099892bd89---42371860954.pdfIn PDF document text
    • https://bruceautoservice.com/files/file/2389441313.pdfIn PDF document text
    • https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/16110962257bcd---38885110481.pdfIn PDF document text
    • https://censcakmu.org/board/file/files/1738750150.pdfIn PDF document text
    • http://sys-svinding.dk/userfiles/file/16218254971.pdfIn PDF document text
    • https://majubesar.info/contents//files/webonuba.pdfIn PDF document text
    • https://churchofgodinjamaica.org/app/webroot/files/83630385386.pdfIn PDF document text
    • http://hkbroadwin.com/userfiles/94537389184.pdfIn PDF document text
    • http://wolfroccatiassociati.it/userfiles/files/83919404085.pdfIn PDF document text
    • https://www.conkite.com/wp-content/plugins/super-forms/uploads/php/files/38c3fae6f17a13d4ccfc2372bed2f269/talifuwasokumovevomogaj.pdfIn PDF document text
    • 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_off0000dcc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCC6 18116 bytes
SHA-256: ab70d9bf4a17336017e7fc95c765e7e02c5a65a97103e9ef5d6e9d12b54383dc
font_01_sfnt_off00010b2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B2E 11144 bytes
SHA-256: 045a11ed685379b0d67ff5cbacdeea137e41528f996998ec6b78e2ce9a9ae3d2
font_02_sfnt_off000124e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124E5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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