Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ae13f77ba804750…

MALICIOUS

PDF

89.1 KB Created: 2021-08-03 09:46:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 994c569e28e392c905d91f536d928ace SHA-1: b0786504531e2f88b8975d0789aacfb7404b1546 SHA-256: 3ae13f77ba8047502af67c0913170d035f3acc81f4904cc25e52b0795bd6f058
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious. It contains a link farm pointing to numerous URLs, many of which are hosted on compromised WordPress sites or disposable domains. The primary purpose appears to be directing users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://aranykoronakft.hu/userfiles/file/27490721106.pdf In PDF document text
    • https://fallsplat.se/file/22969632307.pdfIn PDF document text
    • http://www.recetasyconsejos.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9a08a3954---85362326764.pdfIn PDF document text
    • https://alismobile.co.uk/wp-content/plugins/super-forms/uploads/php/files/211547729b92f144a085f276137cdad6/65924341342.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/ee1ad373fd2f5d481fea75aa00e3cfe6/najekarazax.pdfIn PDF document text
    • http://kalikraft.com/images/file/5774790837.pdfIn PDF document text
    • http://iphysiology.ru/upload/37090895008.pdfIn PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608d380cba51d---wonoxaxavot.pdfIn PDF document text
    • https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609689447d313---tuvuxegubivukikupoxe.pdfIn PDF document text
    • http://anaminfo.com/attachfile/file/woxisobironemorelipuzani.pdfIn PDF document text
    • https://www.prowallpanama.com/wp-content/plugins/super-forms/uploads/php/files/123851be79339915bcd6f1a3ebeda76f/20073780191.pdfIn PDF document text
    • https://aep-tc.com/cache/fck_files/file/jigexopowazukinewagadagun.pdfIn PDF document text
    • http://3sdent.com/upload/files/70510811441.pdfIn PDF document text
    • http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609df49f044eb---kabijufaxurelezuxuleru.pdfIn PDF document text
    • http://vipavtoufa.ru/wp-content/plugins/super-forms/uploads/php/files/8e013c1c21289fe02fb1fa29cbf645dd/1403534852.pdfIn PDF document text
    • https://susta.vn/userfiles/file/79463370819.pdfIn PDF document text
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098a6ad79f52---migijija.pdfIn PDF document text
    • https://walkandsmile.com/userfiles/file/lujivigi.pdfIn PDF document text
    • http://aardbeienfeesten.nl/uploadimages/files/60030699589.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/q3vl89a40jk264mj40k9mrpuv5/nekasipemobuwe.pdfIn PDF document text
    • https://detectiveoffice.net/userfiles/file/4488078252.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=where+is+the+cultist+ship+north+of+theraPDF 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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f933.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF933 16900 bytes
SHA-256: 1188c6533e3312de7cc2940f8bd3f6b7f735ed5ca4f8883b4cd8b15a83aa4fc2
font_01_sfnt_off00012564.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12564 10668 bytes
SHA-256: ccf765ab3171613a34e9e3c9561da81d382e286f676c626d7ee0c68c70ecdfb6
font_02_sfnt_off00013dd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DD8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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