Malicious PDF — malware analysis report

Static analysis result for SHA-256 09f2f691a68e20e7…

MALICIOUS

PDF

83.9 KB Created: 2021-09-13 10:18:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 70c66eec456c1ddea774f6b1ddfef1b3 SHA-1: a7784255ca6cdcb7415b68668a56fa2b8c1e0ca2 SHA-256: 09f2f691a68e20e7bdcbf7f29295f8cc812ebab27f531649dede9f51478c583d
156 Risk Score

Malware Insights

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

This PDF was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier. It contains a link farm with multiple URLs pointing to compromised WordPress upload directories, suggesting a phishing or malware distribution attempt. The document body is heavily obfuscated and unreadable, providing no direct clues to its intent beyond the heuristic findings.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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 http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/1613ba450ea571---pujazuwutiponow.pdf In PDF document text
    • http://sghr.ca/upload/ckfinder/files/fufomogurovijabijul.pdfIn PDF document text
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/161328cd376cf9---68456530318.pdfIn PDF document text
    • http://wdnederland.nl/file/lefafadibidakiturononaj.pdfIn PDF document text
    • http://autoneza.cz/UserFiles/File/vuzevodox.pdfIn PDF document text
    • http://cermak-expo.cz/data/files/file/tezuvutedujofukuje.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f88875867d---89430653186.pdfIn PDF document text
    • https://prestinireedcorp.com/userfiles/files/remegiwenazerezobub.pdfIn PDF document text
    • https://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613b53266ea5f---89759366681.pdfIn PDF document text
    • http://khangvietdn.com/uploads/file/fuver.pdfIn PDF document text
    • https://sportnazona.bg/f/uploads/files/mosolekixozurigabosokixo.pdfIn PDF document text
    • https://needlugs.com/userfiles/files/50448929182.pdfIn PDF document text
    • http://meadescafe.com/userfiles/file/95690899162.pdfIn PDF document text
    • http://tecs4.com/intranet/ckfinder/userfiles/files/xulodijegegokol.pdfIn PDF document text
    • http://associatedreclaimed.com/userfiles/files/67020448722.pdfIn PDF document text
    • http://dezmaster.com/userfiles/file/dupowibozomugofifukajuso.pdfIn PDF document text
    • http://marleenjansen.nl/images/uploadfiles/lalowexixoxasim.pdfIn PDF document text
    • http://arcomproltd.com/userfiles/file/52092882698.pdfIn PDF document text
    • https://angem.fr/userfiles/file/girizejotuf.pdfIn PDF document text
    • https://ijpdua.com/contents/files/mogutilun.pdfIn PDF document text
    • http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613669d27a298---zaxakajowaj.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=all+over+you+tabPDF 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e43a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE43A 10136 bytes
SHA-256: 7ebfc94f9b0bc1e6a77792d6a5740e07667a40d43df084b255bd980f1471d48e
font_01_sfnt_off0000fb1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB1B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001132d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1132D 18460 bytes
SHA-256: a066b65897b6eb8d289040f8bb027312dbebfb249e0efd7f87fb857b923f5bf8