Malicious PDF — malware analysis report

Static analysis result for SHA-256 412e6584ddc0881d…

MALICIOUS

PDF

87.3 KB Created: 2021-06-28 16:23:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 78d6ce6b498be55dfa980fab6bf10ff3 SHA-1: 9d4bb64126051f99ca6f7fb71dcc90c4cacc586d SHA-256: 412e6584ddc0881def0537083cb25bf4151d5092d7d8508eb39e4ae553b38c67
156 Risk Score

Malware Insights

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

This PDF was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, with numerous links pointing to external sites, including those on compromised CMS uploads and disposable hosting. The presence of these links suggests an attempt to direct users to potentially harmful content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8538

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
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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://kondicionery-dolgoprudny.ru/upload_picture/file/12447213324.pdf In PDF document text
    • https://securitydm.rs/slicice/file/66651216576.pdfIn PDF document text
    • https://laurallo.com/ckfinder/userfiles/files/sulemiwunuwamuribarux.pdfIn PDF document text
    • https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be390935d90---koseriluvo.pdfIn PDF document text
    • http://incucinaconalberta.com/userfiles/files/tesiliremijomakumufa.pdfIn PDF document text
    • https://anzmrrn.org/wp-content/plugins/formcraft/file-upload/server/content/files/160afbf376b108---62268574641.pdfIn PDF document text
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609867b8874bf---nosokugugakusi.pdfIn PDF document text
    • https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/s65ccpgv1iua7qac99gf9e76dt/27685756872.pdfIn PDF document text
    • https://canadianrelocation.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606f9957cd63d---defaxe.pdfIn PDF document text
    • http://xn----8sbnbd9chja.xn--p1ai/userfiles/file/mowowapasozovedejupu.pdfIn PDF document text
    • https://kvartira-zalog.ru/wp-content/plugins/super-forms/uploads/php/files/1b935291ba15634303093f602d069d47/biwulurenugeb.pdfIn PDF document text
    • http://deckdreams.ca/clients/3/34/34055ef41782f8f15ebf372c1e39ecad/File/45871381347.pdfIn PDF document text
    • http://aa-nusd.jp/kaxogefodimeraxefasuzuga.pdfIn PDF document text
    • http://thegibbsfamilyreunion.com/clients/d/d9/d929505c7faf6263097cc97620c39d65/File/besubadimapapozefibivoba.pdfIn PDF document text
    • http://koreanhotpot.com/uploads/files/migimekaba.pdfIn PDF document text
    • https://contabil-fiscal.ro/mm/file/43041058406.pdfIn PDF document text
    • http://jfkanacon.org/data/userfiles/files/25638262751.pdfIn PDF document text
    • http://bpabv.nl/uploadfiles/file/66645248587.pdfIn PDF document text
    • http://cetinelektrik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160862b48e46be---53336804587.pdfIn PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/8756e807ac44c022e4345f799efae222/26066775740.pdfIn PDF document text
    • http://davidhammerstein.org/userfiles/file/99108091375.pdfIn PDF document text
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093b0440ddb2---bodatixebiwunofabara.pdfIn PDF document text
    • http://planetamama.ru/files/file/gonenuwaj.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=tumbled+blue+goldstone+meaningPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e739.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE739 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ff50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF50 10696 bytes
SHA-256: 5596c944f2bc8e6862111890e4f3afac65d4ba5e417d63c226d3e9a29ef1654a
font_02_sfnt_off00011799.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11799 16396 bytes
SHA-256: 74a6be4873b6ad4becb00600b0d5a94b0c458f9427bd0bc037c9bcf85208a69a
font_03_sfnt_off00012e3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E3E 17660 bytes
SHA-256: 368dcb8055629d71942023870a2fefe6ea8714c1793727b56f77cd78f85c7560

Open this report in the interactive analyzer, or submit your own file for analysis.