Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0cba02fb8830a11…

MALICIOUS

PDF

92.3 KB Created: 2021-06-19 05:50:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 8595d4ad73126f5ade7314b47ffd512f SHA-1: 38339393891dea60e398d90226f5a27f41a306e3 SHA-256: e0cba02fb8830a11d1c8e245761f50541f15590c1239ea06047cf214f471e155
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm used to distribute malicious content. The primary lure appears to be a fake download for "Attack on Titan English sub download", redirecting to a PDF hosted on a compromised WordPress upload directory.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 7

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://crysiq.ru/uplcv?utm_term=attack+on+titan+english+sub+download PDF link annotation
    • http://nd-58.ru/wp-content/plugins/super-forms/uploads/php/files/3086e88a4312214aa6f92494462f410f/raguvidufujizuzibamuwemax.pdfIn PDF document text
    • https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/17eqhp3nucc0fglb3rkvm2a88a/61873510020.pdfIn PDF document text
    • http://www.klpreschool.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a24b5f54f47---30793127470.pdfIn PDF document text
    • https://tfnd.org/wp-content/plugins/super-forms/uploads/php/files/a729bad02c7f73af7075f458dd2fa341/pufibuxofodono.pdfIn PDF document text
    • https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8b953c1354---27901991285.pdfIn PDF document text
    • http://stroisvias.ru/userfiles/file/9544445638.pdfIn PDF document text
    • https://ankaratemizlikcim.com/depo/sayfaresim/file/92241414577.pdfIn PDF document text
    • https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c96ae4e4ec5---pafafuvadegejifojakigene.pdfIn PDF document text
    • http://al-bandak.com/userfiles/file/satedazuz.pdfIn PDF document text
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/16077e3cbb962e---43326398003.pdfIn PDF document text
    • http://christembassydocklands.org/wp-content/plugins/super-forms/uploads/php/files/2b801d0f6b71961003c35f3ddfb88567/wadikokijitagoloxetazus.pdfIn PDF document text
    • https://fobiy.net/wp-content/plugins/super-forms/uploads/php/files/e08003b43ce7b9fa31675f3feb5c487a/71086529657.pdfIn PDF document text
    • https://www.getfitcrew.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c54e48b271---lovifav.pdfIn PDF document text
    • https://eyetracking.pl/userfiles/file/13278092374.pdfIn PDF document text
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/160b637473b4f6---divexefugesosizupid.pdfIn PDF document text
    • http://buildinggodskingdom.com/webcms/file/6118642133.pdfIn PDF document text
    • https://xlux.vn/wp-content/plugins/super-forms/uploads/php/files/dp9ktvl673m6ndmido7bda0kvg/75945154288.pdfIn PDF document text
    • https://vaytieudungtragop.com.vn/wp-content/plugins/super-forms/uploads/php/files/v08nr5peb0j7m3e0j7s6i8u4dr/lubozexemukuratafusan.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://www.gnu.org/licenses/lgpl.htmlRegularDanhHongIn PDF document text
    • http://www.geocities.com/dnhhngIn PDF document text

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e2ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2AD 6440 bytes
SHA-256: a606a6dede3b99472d2ac97761204782646b5f75106b48d1abccbe9a99ca9a4c
font_01_sfnt_off0000f270.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF270 4120 bytes
SHA-256: 03eeafd9f3f3cb3c1d547ed97ffb4a36788d803c3cee82d2c5954144e6774ea9
font_02_sfnt_off00010112.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10112 5392 bytes
SHA-256: 4a0e01aa1742e16823450cb85c75a1bcbb75d74f4b1d24bbdc062d0f1bfbadd9
font_03_sfnt_off00011372.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11372 12044 bytes
SHA-256: 1794486a2992f650c5a03a35cf4364f257d8c0b337bc29295b81f3b61db47149
font_04_sfnt_off0001313c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1313C 2044 bytes
SHA-256: 28336a0cb3f8e641e75945af3d35324194abd932e21d2bc38800f63db353b10a
font_05_sfnt_off00013aa7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13AA7 11288 bytes
SHA-256: cb147bb709773c76665ce9ed90c90cb733116875ba96f9a91ce59793eda54661

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