Malicious PDF — malware analysis report

Static analysis result for SHA-256 e219ced8ca8d9008…

MALICIOUS

PDF

84.7 KB Created: 2021-06-26 02:58:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9359aa8b4e7b57fb5f622a51a571950b SHA-1: c0024f2165647f8eead29e1fe05fd37c278a6840 SHA-256: e219ced8ca8d900892e70fd7580a854a6c2950bc7a7a63149388137b5316011a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised WordPress sites, suggesting a phishing or malware distribution campaign. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the presence of external links and the overall detection profile strongly suggest it is designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://coretry.ru/uplcv?utm_term=tofu+in+the+air+fryer
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a266a39db3---8723756282.pdf
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c247559924f---lobakiwikolalera.pdf
    • https://ankaratemizlikcim.com/depo/sayfaresim/file/95121689797.pdf
    • https://sharidendesignasphalt.com/wp-content/plugins/super-forms/uploads/php/files/568ef969a3241c9960f549c6340a0f30/41047261582.pdf
    • https://stagerightstaging.com/wp-content/plugins/super-forms/uploads/php/files/a2e52f3aeafc6de714a8562e43255a31/5619786577.pdf
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/92aec0bcf53a0bdc114634157e8cda82/43684952698.pdf
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/99d00778c31340838f78a889a0e62563/sunoguweverunaxi.pdf
    • http://caribsplash.org/wp-content/plugins/formcraft/file-upload/server/content/files/160acc68445556---tuxafomuwasazofulukibixug.pdf
    • https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16085c01fe04fc---271179132.pdf
    • https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/160b56e6a24013---reverafe.pdf
    • https://monyetmesum.com/contents//files/rapatesalubinunix.pdf
    • https://xn----8sbaavnccwq4am.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/399d9eb84b266f905883dbfb25a2a12f/48236136228.pdf
    • http://domholidays.com/userfiles/file/97016002731.pdf
    • https://engravestone.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609482c4b5bd1---91724579008.pdf
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096dc9415e24---gerefibaku.pdf
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/160beaf7cb1fda---jubofasabumaxijikip.pdf
    • http://korytnica.net/data/files/85771958721.pdf
    • https://getlovebooks.com/wp-content/plugins/super-forms/uploads/php/files/37ea38686447a4e7994024a7ab2ffea9/fovolepilarariku.pdf
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607b30e9da041---79785379975.pdf
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160923165ec4b8---47263431443.pdf
    • https://www.wikiwebagency.it/wp-content/plugins/super-forms/uploads/php/files/0a4fd202cff5be19f5703b9f1975e5f2/51172575379.pdf
    • https://costumeworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c44622c0aa---newumopavefuwotuniwisavo.pdf
    • http://cricalliance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160867f064d56a---28098150710.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_off0000e9c3.bin
5adff8df94557ec2f2565cd3267b0b76d3ce7f0c7af36ec03db66ab0011ae890
pdf-font-stream PDF embedded font (sfnt) at offset 0xE9C3 17340 bytes
font_01_sfnt_off000116e0.bin
0d0c0bbad65a0e132a7ec067558e985ab62042f590cfd82725891af74503a32f
pdf-font-stream PDF embedded font (sfnt) at offset 0x116E0 10276 bytes
font_02_sfnt_off00012df7.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12DF7 16792 bytes