Malicious PDF — malware analysis report

Static analysis result for SHA-256 80f2c21b6375360d…

MALICIOUS

PDF

77.1 KB Created: 2021-09-09 15:50:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 24ba5c7201cc1642a7bb6d002ed04ab3 SHA-1: ccea36539714720bd4d5c69eeb1eb05fde08b832 SHA-256: 80f2c21b6375360d7b9bf958ad5802d5cb500ca2c9cdc372baf166b5a98b3db4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier 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 disposable or compromised, suggesting a link farm designed to redirect users to malicious content. The presence of these links and the overall structure indicate an attempt to exploit users through deceptive redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://ketchas.ru/uplcv?utm_term=drive+angry+full+movie+online+free PDF link annotation
    • http://ever0036.com/assets/uploads/ckedit/files/20210908035618.pdfIn PDF document text
    • http://motolargo.pl/userfiles/file/7707429237.pdfIn PDF document text
    • http://asdgolfclubtoscana.com/writable/public/userfiles/file/mivogiduritadakonone.pdfIn PDF document text
    • http://www.rsvpcatering-ar.com/files/imagesfile/84907031139.pdfIn PDF document text
    • https://fiscalonline.ro/app/webroot/files/userfiles/files/ganawevap.pdfIn PDF document text
    • http://costanzolegal.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/tigota.pdfIn PDF document text
    • http://studiogalata.it/userfiles/files/24710725223.pdfIn PDF document text
    • http://piemonteforyou.it/userfiles/file/17661128167.pdfIn PDF document text
    • http://hosungtour.com/FileData/ckfinder/files/20210901_1871C4FAB55C69D5.pdfIn PDF document text
    • http://globalfeedindustry.com/upload/files/tetozebu.pdfIn PDF document text
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/161362d3f8bd2d---92052898309.pdfIn PDF document text
    • https://hightechrustremovers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16138292270f8a---28173812214.pdfIn PDF document text
    • http://archissimo.eu/userfiles/files/99438528219.pdfIn PDF document text
    • http://bikaji.zohukum.com/ckfinder/userfiles/files/kumab.pdfIn PDF document text
    • http://zonwering-nederland.com/ckfinder/userfiles/files/76507279298.pdfIn PDF document text
    • http://gianphoiduyloimodel.com/Images_upload/files/65940520559.pdfIn PDF document text
    • https://www.hkha.com.hk/ckfinder/userfiles/files/9506403606.pdfIn PDF document text
    • http://burelomdo.com/ckfinder/userfiles/files/xubezavejugisatodivevoliw.pdfIn PDF document text
    • http://wirheiraten.de/images/file/16213246241.pdfIn PDF document text
    • https://deltaguvenlik.net/userfiles/file/1237076670.pdfIn PDF document text
    • http://frickcontrols.com/uploads/files/88589794297.pdfIn PDF document text
    • https://rugsinc.in/UserFiles/files/61077167294.pdfIn PDF document text
    • https://xn----7sbabak5acz7byau.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/f25b0043e0dcdb91b34c2a1471fcfff1/fesozurege.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c8e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8E2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e0f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0F9 10572 bytes
SHA-256: 901ef63441fe6a16742e3b203969a59865deec1d409e656d6d723b60767c732c
font_02_sfnt_off0000f912.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF912 17444 bytes
SHA-256: 377594764cc1c450ddac24e01c2deda58370379baab330dfb94daa778d7f276b