Malicious PDF — malware analysis report

Static analysis result for SHA-256 044ffd41913218c5…

MALICIOUS

PDF

82.1 KB Created: 2021-09-02 03:30:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 9c50379ca230643f27be67376db69f6c SHA-1: e11356a9b78b876fcaec31bfc0290984a1af8674 SHA-256: 044ffd41913218c5982ed56ad33670cb64db86f16eabd82116f0e26bc76275c1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as 'Pdf.Phishing.Trojan'. The document contains numerous embedded URLs that point to compromised WordPress sites and other disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of these URLs and the overall structure indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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://pixomot.ru/uplcv?utm_term=statistics+for+business+and+economics+anderson+pdf PDF link annotation
    • https://www.helpagesl.org/wp-content/plugins/formcraft/file-upload/server/content/files/160982eb06b967---vikulikenagire.pdfIn PDF document text
    • https://www.c2commercial.com/wp-content/plugins/super-forms/uploads/php/files/399799e2a2b7cc0f6bf5da9e4f1dd83c/timevikebupumapuneruti.pdfIn PDF document text
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1612c7f621866f---95217929529.pdfIn PDF document text
    • https://sgdivorcelawyers.com/wp-content/plugins/super-forms/uploads/php/files/1ff48a305599a6c94b95eac98e619705/soxurozigevana.pdfIn PDF document text
    • http://spalovnachemolak.sk/userfiles/file/10709331344.pdfIn PDF document text
    • https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a1b1e26c46---32424970663.pdfIn PDF document text
    • http://arcenevents.nl/site/upload/files/28238336833.pdfIn PDF document text
    • https://senzedigicraft.com/wp-content/plugins/super-forms/uploads/php/files/f5bc1af6499e8a8e5b56af069b914cf3/95095039286.pdfIn PDF document text
    • https://arch.ua/ckfinder/userfiles/files/vararitafotovi.pdfIn PDF document text
    • http://chinajessie.com/seadata/data/uploads/img/file/162577957346.pdfIn PDF document text
    • http://galettedesrois.hu/userfiles/file/lazat.pdfIn PDF document text
    • https://www.temsilcisitesi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d849f6db6a---dudunobesotipiv.pdfIn PDF document text
    • https://accuratesearch.com/userfiles/file/tojowipe.pdfIn PDF document text
    • https://wholisticvibrations.com/wp-content/plugins/super-forms/uploads/php/files/4a6a3cbe36d64d78f5c664ac259d30a5/16148255324.pdfIn PDF document text
    • https://smaransaving.com.np/ckfinder/userfiles/files/90329423792.pdfIn PDF document text
    • http://thebrownbag.vn/upload/files/42140194663.pdfIn PDF document text
    • https://weilaimachinery.com/userfiles/files/94527687847.pdfIn PDF document text
    • https://gaseg.com/wp-content/plugins/super-forms/uploads/php/files/ihkmns3vmgvelga00tdmueujad/57842765901.pdfIn PDF document text
    • http://aquamedia.cn/ckfinder/userfiles/files/89609047561.pdfIn PDF document text
    • https://myarchitect.es/ckfinder/userfiles/files/gurulajili.pdfIn PDF document text
    • http://canhtoanland.com/upload/files/gavajaliluwugabuxajuz.pdfIn PDF document text
    • https://bibliotheque-des-arts.com/ckfinder/userfiles/files/karokabozudepa.pdfIn PDF document text
    • http://wadirumshootingstars.com/userfiles/file///83941035928.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_off0000dc7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC7C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f48e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF48E 16800 bytes
SHA-256: 02122bca135180bb01320045f36efbf5bae95f8e0e8c31d2aa8279e364922763
font_02_sfnt_off00012036.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12036 11052 bytes
SHA-256: 96da04e9cab66412f1005599855575f438a4a5bf3e58dda7705f85de586623f6

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