Malicious PDF — malware analysis report

Static analysis result for SHA-256 46cb67c6e86ea4ba…

MALICIOUS

PDF

77.9 KB Created: 2021-08-27 23:23:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-07
MD5: e675515934f6227f21b7dc031abd29c9 SHA-1: 8224ce6d2a09eafc0f821bdda0213093fea68ed4 SHA-256: 46cb67c6e86ea4ba9a70d8a1fe80d99e53abdb8e6126460414458cd95f5b94af
156 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which point to compromised websites or disposable domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The file's structure as a link farm is designed to lure users into clicking potentially harmful links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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=student+of+the+year+2+watch+online+for+free PDF link annotation
    • http://fcv-bo.org/data/fcv-bo/userfiles/file/4000474155.pdfIn PDF document text
    • http://duancanhotot.com/upload/files/45847664176.pdfIn PDF document text
    • http://alexanderkanevskyartgallery.com/clientMedia/file/tufogojopufozulije.pdfIn PDF document text
    • http://bestbelly.org/content/files/files/50122804086.pdfIn PDF document text
    • http://softtox.com/new/userfiles/file/59007246311.pdfIn PDF document text
    • https://www.mybizwebsites.com/wp-content/plugins/formcraft/file-upload/server/content/files/160849376a9e29---49757705855.pdfIn PDF document text
    • https://dehayemek.net/upload/ckfinder/files/53407406326.pdfIn PDF document text
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607041e5698b4---jezoregirakepijiri.pdfIn PDF document text
    • https://sv-fin.ru/wp-content/plugins/super-forms/uploads/php/files/3c43a87dace629fa3aff8f52eca62318/74160389574.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/v5tkkv1eb3f7rtjt8ovgeinkr0/tokorekazidi.pdfIn PDF document text
    • http://mnogonomerov.ru/uploads/file/wopurakegetekasej.pdfIn PDF document text
    • http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/16072235f1273c---bewopokomifo.pdfIn PDF document text
    • https://kantankacreative.com/wp-content/plugins/super-forms/uploads/php/files/ea8cafedc67e2e736c32ade2d6d8a0b8/wegixulerusiluviza.pdfIn PDF document text
    • http://filtrydokoparek.pl/img/all/39037213460.pdfIn PDF document text
    • http://www.libroparlatolions.it/backoffice/ckfinder/userfiles/files/31954128872.pdfIn PDF document text
    • http://gld-lining.com/user_img/files/vigugapipik.pdfIn PDF document text
    • http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160884b4b05d39---46173202149.pdfIn PDF document text
    • https://www.haievent.com/wp-content/plugins/super-forms/uploads/php/files/omlei9rdq03n9o4tdsv6fs0tqu/254491930.pdfIn PDF document text
    • http://maidnheaven.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088912f53b3f---lonisaserowe.pdfIn PDF document text
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e334476330---76513780641.pdfIn PDF document text
    • https://0900107678.com/upload/file/pogegomekovutumona.pdfIn PDF document text
    • https://www.kalirich.com/wp-content/plugins/super-forms/uploads/php/files/f68pngnrq5jeoajk2cs5kg7tv0/62490857427.pdfIn PDF document text
    • http://canadanur.com/resimler/files/giraratofuzefo.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_off0000cbcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBCB 17200 bytes
SHA-256: 81bdd6e2559268825108c71cb95d863e407b86eb44ba5fdc8937bbc1115c6b16
font_01_sfnt_off0000f80e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF80E 10900 bytes
SHA-256: d37182ce5817844e139b8fb2655f355c372b4a7b3f9a2d45d9345594abae5383
font_02_sfnt_off00011167.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11167 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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