Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc2005a2b46a9641…

MALICIOUS

PDF

84.1 KB Created: 2021-09-09 23:47:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 39f72b4504446132c371fa6b850abf42 SHA-1: 4c48e0ff97141ae2978962d196debdc9693de299 SHA-256: cc2005a2b46a964159243dc1e91bdaa6554278e2d29284f63591b76758090172
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to websites hosted on compromised CMS platforms or disposable hosting, indicative of a link farm designed to lure users to malicious sites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://cerescommoditiesltd.com/Images_upload/files/pusamo.pdf In PDF document text
    • http://clear-es.net/yamituki-n/uploads/files/85583034156.pdfIn PDF document text
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f83df3f74a---xugolodijuloma.pdfIn PDF document text
    • http://ping-property.com/user_img/files/lurimanapisukogu.pdfIn PDF document text
    • https://www.ojchamber.com/ckfinder/userfiles/files/jesimuwagesus.pdfIn PDF document text
    • http://www.arborvitae.cz/ckfinder/userfiles/files/fazotige.pdfIn PDF document text
    • https://tonere.shop/app/webroot/files/userfiles/files/62709304177.pdfIn PDF document text
    • https://ehotelgateway.com/bot/ckfinder/uf/files/74549998934.pdfIn PDF document text
    • http://tizianaiberti.it/userfiles/files/kosujudux.pdfIn PDF document text
    • https://ccskin.com/geektic/files/87267140166.pdfIn PDF document text
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135ab50844af---zokotogabozati.pdfIn PDF document text
    • https://cottonweb.net/userfiles/file/jutidepomudorevejidigamol.pdfIn PDF document text
    • https://art-lamps-rali.eu/files/file/jufupivibufofajufisaji.pdfIn PDF document text
    • http://www.hkrns.org.hk/ckfinder/userfiles/files/wobigilirifov.pdfIn PDF document text
    • https://www.artikel238.nl/emmwebbit/resources/ckfinder/userfiles/files/kujimiluwezukemuzokof.pdfIn PDF document text
    • http://hitecds.com/userfiles/file/rowonegotuzilubajus.pdfIn PDF document text
    • http://cudicio.it/images/file/33114513447.pdfIn PDF document text
    • https://butterfly-propertymanagement.com/userfiles/file/62946557261.pdfIn PDF document text
    • http://ulv-fogger.es/d/files/89218804204.pdfIn PDF document text
    • http://gyndoktors.de/ckfinder/userfiles/files/jilubotenoporekupunepofu.pdfIn PDF document text
    • http://stkvn.ru/wp-content/plugins/super-forms/uploads/php/files/c7316721ffa6541194c0ba50d174445a/12733337450.pdfIn PDF document text
    • http://lonniestireandauto.com/nbloom/fckuploads/file/lupekefeseveruboki.pdfIn PDF document text
    • https://hotelristorantenovecento.it/wp-content/plugins/super-forms/uploads/php/files/725502bb72d35b62d6052a8c79f8142a/goperibefatukate.pdfIn PDF document text
    • http://bualuang101.com/backoffice/upload/files/28302496090.pdfIn PDF document text
    • http://vasset.bg/userfiles/file/buwovofimiwademukokozoxa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=how+to+remove+unwanted+apps+from+redmiPDF 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_off0000e2b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2B1 10856 bytes
SHA-256: c65fd8568171636a96dd655e72ee4fb95e4163936fb9ecb9b523b31fbead9a9c
font_01_sfnt_off0000fbc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBC7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000113d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113D9 18040 bytes
SHA-256: c514cb9fa07cc575353232edd78d66a8f671fc1c3c56120e825841478ba77f26