Malicious PDF — malware analysis report

Static analysis result for SHA-256 d70587319bf4ed02…

MALICIOUS

PDF

88.3 KB Created: 2021-07-05 17:46:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 360fcea5c0dfabf64f3bb0e9b8c6853e SHA-1: 97e858faacc6fba0c987255df4e015f38357bd93 SHA-256: d70587319bf4ed026ee6e5cb0702cbae0a656bb66e437f52b1b586b395c33572
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised websites and disposable hosting, suggesting a phishing or malware distribution scheme. The PDF structure and embedded links are consistent with attempts to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9958

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://drafthe.ru/uplcv?utm_term=jail+in+english+meaning PDF link annotation
    • https://liniagdanskzydowo.pl/files/32201856642.pdfIn PDF document text
    • https://mudateconmigo.cl/wp-content/plugins/super-forms/uploads/php/files/702e50dc0099a3935f079d1a261371e6/xunazosomukepoje.pdfIn PDF document text
    • https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/1606f37f5582b5---guwijabavo.pdfIn PDF document text
    • https://allcreaturesinc.com/files/files/54863184677.pdfIn PDF document text
    • http://www.sensible-seeds-premium.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607855f88be55---66147712343.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/fakovifotomi.pdfIn PDF document text
    • http://claudiodauelsberg.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160857788c7b07---xikoluzajibirulalebe.pdfIn PDF document text
    • http://greece-ex.com/images/blog//file/73810898484.pdfIn PDF document text
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d9fd59c06a9---86408359579.pdfIn PDF document text
    • http://eaas-journal.org/survey/userfiles/files/nobilezobanufodumemek.pdfIn PDF document text
    • http://forter.vn/hinhanh/file/jadofowopubikaxajozoz.pdfIn PDF document text
    • https://www.deuba.info/wp-content/plugins/super-forms/uploads/php/files/jmjv5na9bjoe8mqk84q5vjo5jr/zumujezexikofi.pdfIn PDF document text
    • https://moto-trend.cz/public/files/fck/file/5340515804.pdfIn PDF document text
    • http://asupuro.com/upload/save_image/files/11130626736.pdfIn PDF document text
    • https://artsketch.ru/wp-content/plugins/super-forms/uploads/php/files/7475ba604a6ed4597a8e8c8eef92a21b/52506412835.pdfIn PDF document text
    • https://autosaloncenter.com/uploads/file/zagofutevininivirub.pdfIn PDF document text
    • http://altelaw.com/uploads/image/file/puwidefiwunorivobumoviz.pdfIn PDF document text
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607cf237727eb---lubuwanexenivan.pdfIn PDF document text
    • https://leo-translate.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/1607f78e7ae447---wimoxozuxanativebim.pdfIn PDF document text
    • http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608b61d26d37d---48302231453.pdfIn PDF document text
    • https://aristonails.com/articles_files/files/gujakafimesefeku.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00010ac2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x10AC2 16968 bytes
SHA-256: b0c1da6724879b766e6a56b78bca8a8fc7380fbe303f9ad76a69028c60ecd0db
font_00_sfnt_off0000da74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA74 18264 bytes
SHA-256: 4dc74bca482d3e2fde5af97609ef49b29d6f68251cfb8130935bf0a03af7feac
font_02_sfnt_off0001231e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1231E 10228 bytes
SHA-256: dcf676d3fd2be49144c1867fae805caf71881d6356bc38d9527966258bbb9442
font_03_sfnt_off000139d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139D0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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