Malicious PDF — malware analysis report

Static analysis result for SHA-256 67e0faa004228782…

MALICIOUS

PDF

75.1 KB Created: 2021-09-18 08:05:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: b8bf80de0f9904fc4c4f6d7f968e9178 SHA-1: bdb8cbebbc195dba63fcdfd1d22e3ed5df7a0b1c SHA-256: 67e0faa004228782f6da8d73112f0e3b19a00f164c84de751793515ac8c30e1e
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to various domains, many of which appear to be compromised or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The heuristic PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM suggest the document is designed as a link farm to evade detection and distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://smidgel.ru/uplcv?utm_term=pubg+lite+on+android PDF link annotation
    • http://vuoncotichdep.com/upload/files/37928952530.pdfIn PDF document text
    • http://honeycontacts.com/uploades/userfiles/file/lovemuropuwuta.pdfIn PDF document text
    • https://noursportevents.com/wheelmarine/userfiles/file/jasomanufij.pdfIn PDF document text
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16137459d78c90---boras.pdfIn PDF document text
    • https://echipamente-scule.ro/userfiles/file/32940676342.pdfIn PDF document text
    • https://carmelocuritiba.com.br/ckfinder/userfiles/files/vanemu.pdfIn PDF document text
    • https://militarynetwork.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16135a8ec38819---11953538076.pdfIn PDF document text
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16143ad82d5409---bekovetimijozokarozarum.pdfIn PDF document text
    • https://weborder.cloud/userfiles/file///62480554429.pdfIn PDF document text
    • http://architettomontanino.eu/userfiles/files/78750217409.pdfIn PDF document text
    • http://usateatop.com/_upload/files/wizagubif.pdfIn PDF document text
    • http://xn--krmer-dnnebacke-1kb72b.de/files/file/74830464608.pdfIn PDF document text
    • http://acelybio.com/upload/files/41881406768.pdfIn PDF document text
    • http://www.mustwalge.ee/data/content/files/rekatitimaludiser.pdfIn PDF document text
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16135bc3d9c698---subofunanuvopisiz.pdfIn PDF document text
    • http://aorganboys.handyfriendship.com/upload/files/1065212101.pdfIn PDF document text
    • https://editora-arara-azul.com.br/site/admin/ckfinder/userfiles/files/napatebaselowozeras.pdfIn PDF document text
    • https://saptabangunmanunggal.com/indomobils/upload/file/zojadinorekuxapadovop.pdfIn PDF document text
    • http://collectifff.be/imgdb/accueil/files/nusubonefokopaf.pdfIn PDF document text
    • http://wolfroccatiassociati.it/userfiles/files/muzobi.pdfIn PDF document text
    • https://parisautotravel.com/wp-content/plugins/super-forms/uploads/php/files/esk2k52ardt14jtvermkiqtkd7/99150322399.pdfIn PDF document text
    • http://escrima-rlp.de/userfiles/file/21574926525.pdfIn PDF document text
    • http://3asoft.vn/img/files/71358934466.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c350.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC350 17132 bytes
SHA-256: d02115910904d0168ffd46c6ebfce7376bb11f08732f84d846f83be31b0a494a
font_01_sfnt_off0000ef88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF88 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001079f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1079F 10496 bytes
SHA-256: f022616528fc821bc38d41c540d9c383eeb8f1c77f68bd44f6b0e587058886ed

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