Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b75b93f62866b9f…

MALICIOUS

PDF

126.2 KB Created: 2021-07-07 04:04:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 85a2063a438527d860b98d4e57bc4aec SHA-1: 014be6a4ced3909d0823bea9857582f28bc294f2 SHA-256: 9b75b93f62866b9f96a6c0fa73003b81e1c3a6f0b7a7a52b8348a843191358aa
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous URLs pointing to potentially compromised websites or disposable hosting. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using such sites to distribute malicious content or phish users. The presence of multiple links to WordPress upload directories further suggests an attempt to host and distribute malicious files.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://zionapostolicministries.org/uploads/file/fotowarukanorejigagidoso.pdf
    • http://savaksangida.com/resimler/files/zujadolutunujuno.pdf
    • https://campermagazine.tv/public/file/rarifosibofutosolefozima.pdf
    • https://dolnoslaskialarmsmogowy.pl/imgturysta/files/vasaromuralumowoge.pdf
    • https://estigotours.com/wp-content/plugins/super-forms/uploads/php/files/8b1807cd7fd15c258fe00a198c560bf9/67209757056.pdf
    • http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606f8f33df583---7439465179.pdf
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607610b9de718---fagufudatutakaragej.pdf
    • https://christembassyromford.org/wp-content/plugins/super-forms/uploads/php/files/c7f1b522eb9df1046421fc5fe707060d/48920275463.pdf
    • http://kochamsushi.pl/UserFiles/file/sibovopovodavajoti.pdf
    • https://beribuket.ru/wp-content/plugins/super-forms/uploads/php/files/bab643caedfe9b8cf7f0fa32a49f7db9/46523849470.pdf
    • http://kompletucetnictvi.cz/files/file/50698039962.pdf
    • https://indacphuc.com/wp-content/plugins/super-forms/uploads/php/files/hpj37hdqv1ao1b2l8usjquo9q5/gibagez.pdf
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160858b7ecf757---50139911608.pdf
    • https://almondzwealth.com/administrator/imagetemp/file/91077648657.pdf
    • http://www.canadavisaservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160817fd817966---64527214345.pdf
    • https://saraelv.no/wp-content/plugins/formcraft/file-upload/server/content/files/160adff7b1ebf9---47470071565.pdf
    • http://al-bandak.com/userfiles/file/nilugilaso.pdf
    • https://tehnol.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609662dc4c57d---33872427309.pdf
    • http://www.expo-hotel.com/english/wp-content/plugins/formcraft/file-upload/server/content/files/16077607ba0c7d---1622949205.pdf
    • https://sumangold.net.vn/wp-content/plugins/super-forms/uploads/php/files/hcbkc35l5jg2qk6df7rqaqtce9/57700258054.pdf
    • https://eliteswimmingpoolsinc.com/wp-content/plugins/super-forms/uploads/php/files/8mi547n034uns4kq7g1fcmmsf1/wanujobidateja.pdf
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077500c02a5a---lerutimu.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=ammonium+nitrate+explosives+for+civil+applications+pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001871a.bin
bd0e1e8d769c2ac081f1f86f0785de4e69cbef8344b439dcb9b63df89921c19e
pdf-font-stream PDF embedded font (sfnt) at offset 0x1871A 11032 bytes
font_01_sfnt_off0001a0c7.bin
ec755929d5e41f4227f43bd4b3710fe1a147dd621c8dfd6b2940f5d5372aeba7
pdf-font-stream PDF embedded font (sfnt) at offset 0x1A0C7 18788 bytes
font_02_sfnt_off0001d2e9.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1D2E9 16792 bytes