Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a45283b13409fd5…

MALICIOUS

PDF

81.8 KB Created: 2021-06-28 09:56:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 4653dada3b34b19cac55b2dcae5cfeef SHA-1: c61334268b58de5cdc6e66f6d3ef907474a41d0b SHA-256: 5a45283b13409fd55fc8da3ab61f6ab266920589286d912ba078ab5ad9d165d3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs that point to various domains, many of which appear to be compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users. The presence of these links and the overall structure indicate an attempt to lure victims to external malicious content, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://infrive.ru/uplcv?utm_term=how+many+liters+is+5+water+bottles PDF link annotation
    • http://chroscina.com/userfiles/file/magepejomizuduf.pdfIn PDF document text
    • http://www.recetasyconsejos.com/wp-content/plugins/formcraft/file-upload/server/content/files/160945d423a6f5---sopamujugeperogude.pdfIn PDF document text
    • http://goref.ru/files/file/29050008919.pdfIn PDF document text
    • http://www.knickmeier.net/images/pageimg/file/7786476176.pdfIn PDF document text
    • http://ajivikafinance.com/userfiles/file/tifilojavetodok.pdfIn PDF document text
    • http://xn--3e0b556bhrbowi6undva.com/ckupload/files/tegenozuketizubemom.pdfIn PDF document text
    • http://iziusb.com/userfiles//file/89586674716.pdfIn PDF document text
    • https://hotelritariccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607cf58020190---97022109356.pdfIn PDF document text
    • https://www.masismarketing.com/wp-content/plugins/super-forms/uploads/php/files/e0bcc659e5a074e45d8d676173b230fa/88562753491.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/hgbe1icqhp861uu11da1qn27tl/lewodofa.pdfIn PDF document text
    • http://palami.by/images/file/jeloxupevaluxelalonurew.pdfIn PDF document text
    • https://grandplaza.bg/uploads/assets/file/tefunefigol.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5831c9d11e---54632667195.pdfIn PDF document text
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/160944e8c87609---tonegenunelinigisaweginof.pdfIn PDF document text
    • http://sixtyguildersresearch.com/admin/photos/file/nadijexutojuvubimela.pdfIn PDF document text
    • http://divorce-difficile.fr/userfiles/file/zeweduzamunotazuduwejo.pdfIn PDF document text
    • https://www.lokalesichtbarkeit.de/wp-content/plugins/super-forms/uploads/php/files/m3vcq3bqsq467uknns4e1tc7r9/bezuzilelidone.pdfIn PDF document text
    • http://gleneaglehoa.org/images/file/29853896911.pdfIn PDF document text
    • https://joefairless.com/wp-content/plugins/super-forms/uploads/php/files/47d5dae7ba8eb4c503bd8643a1e84f0b/33785490785.pdfIn PDF document text
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/160be71e0e506b---96427591954.pdfIn PDF document text
    • http://robalton.es/Albums/images/file///riwosumoxinarevaxifopel.pdfIn PDF document text
    • https://sevsport.info/wp-content/plugins/super-forms/uploads/php/files/98d8337310d2abb46cf274bc5f822c90/47487379642.pdfIn PDF document text
    • http://cw-cut.com/uploads/file/96095318280.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_off0000dd12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD12 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f529.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF529 10732 bytes
SHA-256: 9e2cf1d76d962d16a105243b4670640b0873d1b24a8e374535933ee74ae7e95a
font_02_sfnt_off00010ddf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DDF 16968 bytes
SHA-256: 352cbede517d3deac32f02badd7bfc39946addc7c023dc757e31c0e5251bdddf

Open this report in the interactive analyzer, or submit your own file for analysis.