Malicious PDF — malware analysis report

Static analysis result for SHA-256 06b30d5a3e751c10…

MALICIOUS

PDF

88.7 KB Created: 2021-08-09 06:24:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-07
MD5: a1e659d16ec204b9d6f74e3ad8a7077c SHA-1: af22c14be28f7b205dcda5e2e6d1c4b4f9de3c63 SHA-256: 06b30d5a3e751c1031a2cf1ec0a4444e0a761c8d191e517407de0efba48cd38b
156 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to compromised CMS upload storage or disposable hosting, indicating a link farm. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or distributing malware. The primary function appears to be redirecting users through a series of links, potentially to a malicious payload or phishing site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://cordovajewelry.com/images/file/nijibizup.pdf In PDF document text
    • https://kakvkusno26.ru/wp-content/plugins/super-forms/uploads/php/files/6ab95f9c89c66a4712c3f9dd8d4e4c5e/44463322820.pdfIn PDF document text
    • https://www.iieng.org/editor/ckfinder/userfiles/files/mowanizufaxewodazu.pdfIn PDF document text
    • https://xn--80aaaglcftt5alesfkk7f.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/1ef32f653ebb442a35bbb0c0430a82ec/2047950478.pdfIn PDF document text
    • https://admonks.ru/wp-content/plugins/super-forms/uploads/php/files/784dcbc85b125bc3543db4f9661f9b1b/warirabujufuzoletosob.pdfIn PDF document text
    • https://www.blackandwhite-salon.com/wp-content/plugins/super-forms/uploads/php/files/0f72fce4cd191333ac136d9cdba7660c/naketipazimulakimewabofe.pdfIn PDF document text
    • https://sumangold.net.vn/wp-content/plugins/super-forms/uploads/php/files/ia2jd9o9ne279a6t5vo1cmq0po/44693559816.pdfIn PDF document text
    • http://wdnederland.nl/file/nakekaguxowupopus.pdfIn PDF document text
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/160d52e70517c6---faluri.pdfIn PDF document text
    • http://salonlomi.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1607860c9b53f2---keganipadulala.pdfIn PDF document text
    • https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/2etlj7q7cicftod0me98nhqan3/musawolekug.pdfIn PDF document text
    • https://pisangmanis.com/contents//files/10589541510.pdfIn PDF document text
    • https://ckmusicdesign.nluserfiles/file/44132732507.pdfIn PDF document text
    • https://kraftyz.in/ckfinder/userfiles/files/52876761385.pdfIn PDF document text
    • https://lifecareproduct.in/ckfinder/userfiles/files/72722086154.pdfIn PDF document text
    • https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/or4tgv47b3srrb7sj9v2bcvao7/93488240545.pdfIn PDF document text
    • http://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/1608da908288b0---kimoj.pdfIn PDF document text
    • https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/160a188f707801---70656478579.pdfIn PDF document text
    • http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c969be80aa---16331267373.pdfIn PDF document text
    • https://gbeequestriansurfaces.com/wp-content/plugins/super-forms/uploads/php/files/5vcajm00v05q77l52p64k9keq3/47875001918.pdfIn PDF document text
    • http://hamyarsanatco.com/ckfinder/userfiles/files/4069020366.pdfIn PDF document text
    • http://duszek-lasu.pl/userfiles/file/fofitovosejanesujogoba.pdfIn PDF document text
    • http://ac-kenigsberg.ru/files/file/najawuzubu.pdfIn PDF document text
    • https://bdcomunicazione.it/file/jokafuwojulukes.pdfIn PDF document text
    • http://qqsbg.net/uploads/file/45403775920.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=cooler+master+devastator+3+plus+driverPDF 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_off0000f3ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3CE 10816 bytes
SHA-256: 965956aa83469f955e067956d8a73387821784ae0c571c7cfaf2c5399f7e2d6b
font_01_sfnt_off00010cdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CDB 18596 bytes
SHA-256: 9abf87493e4a21576cdae071708aa5a8e7e98ae142b93d7ab0d1be10b446568d
font_02_sfnt_off00013c90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C90 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1