Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fe3e0c050ce6e7d…

MALICIOUS

PDF

84.7 KB Created: 2021-07-08 06:22:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 4e5e85ee999e9429615d63495f2540bf SHA-1: 3c75bd3549a3d6fa433b63e4dc0767fcbb6570a9 SHA-256: 2fe3e0c050ce6e7d842578732bfb91d695e4912b6f128c201962e81dcd61d9ca
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It functions as a link farm, containing numerous embedded URLs that point to compromised WordPress sites and other disposable hosting domains. The primary purpose appears to be directing users to malicious content, likely for phishing or malware distribution, leveraging the 'Spearphishing Attachment' technique.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://crewmak.ru/uplcv?utm_term=how+to+get+burnt+plastic+smell+out+of+oven PDF link annotation
    • http://kingbikeonline.com/images/upload/File/biwidix.pdfIn PDF document text
    • http://xn----8sbxab3abskk3a2j.xn--p1ai/media/file/vadanubukejo.pdfIn PDF document text
    • http://cuakeobinhduong.com/upload/files/gomepatudovuxuzexego.pdfIn PDF document text
    • https://mavibusiness.it/file/42847882218.pdfIn PDF document text
    • https://oiweld.com/wp-content/plugins/super-forms/uploads/php/files/ae7f7d7c9b7ca40a6491b88bdb10fb55/noterozo.pdfIn PDF document text
    • http://windcampus.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608bb03157047---risiriduporaje.pdfIn PDF document text
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c5a2ee3c006---totitamu.pdfIn PDF document text
    • http://musorcentrum.hu/files/article/file/jigenibijurerakijudemu.pdfIn PDF document text
    • https://eyestech.in/wp-content/plugins/super-forms/uploads/php/files/om962mr9go2lmkogij2llgse1q/revenubejinuzerarinedavus.pdfIn PDF document text
    • https://singaporeroadshow.com/wp-content/plugins/super-forms/uploads/php/files/8d07533b8202f1d6ce1970821875d15a/xatinudidozafejos.pdfIn PDF document text
    • https://cullinanconstruction.com/wp-content/plugins/super-forms/uploads/php/files/jn6stagpk9g3komphlq74dklfg/xipuxiful.pdfIn PDF document text
    • http://dragoniresorts.com/userfiles/18005535033.pdfIn PDF document text
    • https://hotelritariccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607bcad228b3b---mezukuw.pdfIn PDF document text
    • https://www.andyselfstorage.co.uk/wp-content/plugins/super-forms/uploads/php/files/hme774mn73m8m5rp0sqbp60ldg/vufajifidule.pdfIn PDF document text
    • http://kleinschaden.expert/userfiles/file/57395689334.pdfIn PDF document text
    • http://www.toptehnik.si/images/77909322046.pdfIn PDF document text
    • https://www.breastcancerfoundation.in/wp-content/plugins/super-forms/uploads/php/files/ff54dc92a19b9a157ef20f057f2ea750/10988042211.pdfIn PDF document text
    • https://goldenparadisestsimons.com/wp-content/plugins/super-forms/uploads/php/files/ce38b50cd474c2ccd0435531fc56c1dd/3185424345.pdfIn PDF document text
    • http://burragebrothers.net/demo/jolie/beta/userfiles/files/21716900962.pdfIn PDF document text
    • https://alianzatours.com/imagenes/file/74759652385.pdfIn PDF document text
    • https://gagiongvitgiong.com/ckfinder/userfiles/files/rugorukexav.pdfIn PDF document text
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081e71790fbc---vojimupufixapovipafa.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e90f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE90F 16264 bytes
SHA-256: d4dcf0b8d588873a3f018f3a2a361fcf9b7a5bc375dd9955af344055ebee7b9d
font_01_sfnt_off00011339.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11339 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012b50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B50 11204 bytes
SHA-256: d2be1b35bcd6e85c18ad14d73ceaa4037625e15106a540194aad47d1a0df7922

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