Malicious PDF — malware analysis report

Static analysis result for SHA-256 e66930159e893027…

MALICIOUS

PDF

95.7 KB Created: 2021-06-27 02:33:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f2567b267578de2b133d562e8cbd5fbe SHA-1: c36cd8e867cbf71336e58c015574c4df7a69f94a SHA-256: e66930159e893027915eb3ebac9fffe55e5d44a36935ef3034100b0389ac3a5c
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document functions as a link farm, containing numerous URLs that point to compromised WordPress sites and other disposable hosting. These links likely lead to phishing pages or further malware downloads, serving as a distribution mechanism for malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://crewmak.ru/uplcv?utm_term=frank+edward+my+god+has+lifted+me+mp3+download
    • http://www.gunyagder.org.tr/wp-content/plugins/super-forms/uploads/php/files/ookq1bhooj3v3imrpbf7j28575/gubejukimudat.pdf
    • https://www.alongsideasia.com/wp-content/plugins/super-forms/uploads/php/files/03a2b9a6ebea8899a639e0baf924cafd/78791915647.pdf
    • https://ecotranslation.ca/upload/editor/file/vidazexixanijese.pdf
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607192ea23170---robaranumoreregufitel.pdf
    • https://weblative.com/wp-content/plugins/super-forms/uploads/php/files/2ahprs73soe6hgisdd749fel4b/ditaju.pdf
    • https://amagi.la/wp-content/plugins/formcraft/file-upload/server/content/files/16071bde10b046---dufef.pdf
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160784a62665c2---66751338388.pdf
    • http://neonatal-surgery.ru/userfiles/files/74482926473.pdf
    • http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16091c1f84186b---xadewene.pdf
    • http://www.520amis.com/upload/files/pegoserulufurunarawemi.pdf
    • https://olivier-daulte.com/ckfinder/userfiles/files/31541342634.pdf
    • http://guoyangmoju.com/userfiles/files/36463024511.pdf
    • https://home18.ru/wp-content/plugins/super-forms/uploads/php/files/f92345823eb13d9f0c4f491b76d26829/11455520523.pdf
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160981cb0144e1---46950369439.pdf
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c8502fb01d0---ronufewuribegoragedi.pdf
    • http://kidneytexas.org/clients/861060/File/fomobit.pdf
    • http://adria-ex.com/images/blog//file/41500089853.pdf
    • https://masterok-kovka.ru/wp-content/plugins/super-forms/uploads/php/files/c756c9009405e06c9c1177ddf9fba1c2/moratoboj.pdf
    • http://andreevmag.com/wp-content/plugins/super-forms/uploads/php/files/303293e59c750502845d620d045cf16c/69735578908.pdf
    • https://tucsonhomewindowtint.com/wp-content/plugins/super-forms/uploads/php/files/0a8bf322d210f0ce2602aac66ed085aa/kalevubofiga.pdf
    • https://fastcomputer.vn/wp-content/plugins/super-forms/uploads/php/files/fc6c3b25844d3aba8491d5875283d10f/24455425285.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f92e.bin
0a8a8c9c554b56c1e8e20ebd2e2faf17eb49c23d1bfb7758fb29667748f16aa2
pdf-font-stream PDF embedded font (sfnt) at offset 0xF92E 17492 bytes
font_01_sfnt_off00012723.bin
b9fda3f8b560f1ee0cd3f56afa43fde7409187c74d1b2f0adacc0471228b1305
pdf-font-stream PDF embedded font (sfnt) at offset 0x12723 16548 bytes
font_02_sfnt_off00013e4c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13E4C 16792 bytes
font_03_sfnt_off00015663.bin
6cdb49e7279a1875ca931c0ed096526cb2ed7375954295bdbd21e08f547162bb
pdf-font-stream PDF embedded font (sfnt) at offset 0x15663 11388 bytes