Malicious PDF — malware analysis report

Static analysis result for SHA-256 46a456edd044f47f…

MALICIOUS

PDF

78.1 KB Created: 2021-07-24 04:34:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: f51c16b1495213ab7f0b53d9fc1317d8 SHA-1: fbbd0fc4ac11e8ef7c6f16fb6ee9858c13791470 SHA-256: 46a456edd044f47fc30065f86528d623e3bbc47b1057090396849d5e54c7b651
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to potentially compromised WordPress upload storage and other disposable hosting sites. These links likely serve as a distribution mechanism for further malicious content, possibly exploiting SEO to attract victims.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://www.audifonosdoshoydos.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085356be3f3b---nojin.pdf In PDF document text
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/3c90fd7b549e5539a306f5adff20abce/bobiz.pdfIn PDF document text
    • http://clairvoyantinfotech.com/demo/images/8254444429.pdfIn PDF document text
    • http://www.adatechotomasyon.net/wp-content/plugins/formcraft/file-upload/server/content/files/160bdecf70f5b2---zolafijefolabe.pdfIn PDF document text
    • https://duext.com/wp-content/plugins/super-forms/uploads/php/files/365bffa4627cdb1e3b00202947e5f522/guzasub.pdfIn PDF document text
    • http://trenermichal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160a2c5cc154e8---96612584927.pdfIn PDF document text
    • http://bbmeti.it/userfiles/files/62438815619.pdfIn PDF document text
    • http://familiegravesen.dk/ckfinder/userfiles/files/21570331310.pdfIn PDF document text
    • https://nepalimodelagency.com/userfiles/file/5600341181.pdfIn PDF document text
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/160f1cfd841270---fasatevefujopik.pdfIn PDF document text
    • https://matras-matrasych96.ru/admin/ckfinder/userfiles/files/zajiw.pdfIn PDF document text
    • https://legouic-peinture.fr/userfiles/file/76307326739.pdfIn PDF document text
    • https://www.rydalmereprestige.com.au/wp-content/plugins/super-forms/uploads/php/files/eg367mceo6435jqh2e1p2c7jeh/zusunizasaneso.pdfIn PDF document text
    • http://a2itsolutions.com/chop/multimedia/userfiles/file/86926257954.pdfIn PDF document text
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16072c14e17dbe---sabujopu.pdfIn PDF document text
    • https://wholisticvibrations.com/wp-content/plugins/super-forms/uploads/php/files/dc2a674f916b0d0ed30373886b090d5a/52580593247.pdfIn PDF document text
    • https://sf-tfi-pgu.uz/wp-content/plugins/super-forms/uploads/php/files/4bb29bf88492b8343c7039dbd55097f3/kalavereduvusoluxijadim.pdfIn PDF document text
    • http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/ka6aru69smtft00bleud7lk3rn/vajelugawifimifis.pdfIn PDF document text
    • http://manufim.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160940c47eff16---sewimagib.pdfIn PDF document text
    • http://anatolianlgs.com/userfiles/file/76458528305.pdfIn PDF document text
    • http://terapeutickemasaze.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160ad48c4f19e2---23206725668.pdfIn PDF document text
    • http://fiumevivo.it/userfiles/files/ruduzigibobodidobuj.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=shin+chan+tamil+movie+download+in+hdPDF 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

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_off0000cbd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBD3 17792 bytes
SHA-256: 465971195541f98b8d8a72ffe18eb16fdaee78b817169f4cc6da936c448ad383
font_01_sfnt_off0000f9ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9CA 10596 bytes
SHA-256: fe1e5bacfe94cbbaac9ff52c497be8b51e45e71e10f08238d253fcd9b1567e3c
font_02_sfnt_off000111df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111DF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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