Malicious PDF — malware analysis report

Static analysis result for SHA-256 c283c80d1e754168…

MALICIOUS

PDF

91.1 KB Created: 2021-09-07 06:25:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 8b1ff46f0b638c1c76e249d4e26641f2 SHA-1: 61531a6558e28ac8639059b60a521a3494e0873f SHA-256: c283c80d1e754168ed6bc1f503031580f5caf4c33ccd19042e22314750e6537e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a link farm pointing to numerous domains, many of which are hosted on compromised CMS platforms, suggesting an attempt to distribute malicious content or phish for credentials. The PDF structure itself is indicative of a link farm, designed to obscure the true destination of the links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://bdaudit.ro/userfiles/file/fufalabebagumofuvevidu.pdf In PDF document text
    • http://xn--80aer5aza.xn---42-5cdakyymnnb9ake1az.xn--p1ai/ckfinder/userfiles/files/96915760343.pdfIn PDF document text
    • http://kozelskadm.ru/files/uploads/files/98572727932.pdfIn PDF document text
    • https://regeneracion-capilar.com/wp-content/plugins/super-forms/uploads/php/files/0a6c11b7f2b62101966ee06b1c429d86/weseko.pdfIn PDF document text
    • http://raduzhniy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b80584a8e4a---bejevawun.pdfIn PDF document text
    • https://erinmillssmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/p72n6tl97gjvv0ab2chqc09f57/viwetup.pdfIn PDF document text
    • http://andrewsexes.org/clients/867461/File/44156062066.pdfIn PDF document text
    • https://rescue.bg/wp-content/plugins/formcraft/file-upload/server/content/files/160b773b22931f---26692027757.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/38908bc2866c839090fcfa6b9c6905b8/zajiwexudegex.pdfIn PDF document text
    • https://alternativecarrepair.com/userfiles/file/gotaxizomavugun.pdfIn PDF document text
    • http://sazjah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d14460b9b3---gokubilepaveparixaroxo.pdfIn PDF document text
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612b459dc569a---16736576465.pdfIn PDF document text
    • https://thinkglobalcompliance.com/ckfinder/userfiles/files/raraxiwijokofoj.pdfIn PDF document text
    • http://1960whs.com/clients/7/73/73384dfd0d582a2861cf356c55c3c578/File/roresipemulejubavinonemu.pdfIn PDF document text
    • http://shengnabei.com/uploadfile/file///2021061903352230.pdfIn PDF document text
    • http://purpledoorchurch.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb5a136a2f---28056693979.pdfIn PDF document text
    • http://phuquytravel.com/nguyenvanlinh/files/41995955291.pdfIn PDF document text
    • https://www.prowallpanama.com/wp-content/plugins/super-forms/uploads/php/files/460d7cb1d1c84c7d16f1ff602c846497/88134533559.pdfIn PDF document text
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607754160fc61---jivesovejugep.pdfIn PDF document text
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075da1ec57e6---vatewi.pdfIn PDF document text
    • https://www.jancsoalapitvany.hu/ckfinder/userfiles/files/15784488432.pdfIn PDF document text
    • https://doktor-ara.com/userfiles/files/radatilovutuge.pdfIn PDF document text
    • http://icmasistemas.com/userfiles/files/32414552532.pdfIn PDF document text
    • http://kozszemle.hu/uploads/files/wativodaselidi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=jura+a1+coffee+machine+manualPDF link annotation
    • 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fe09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE09 18492 bytes
SHA-256: 4626a7ad35e049309185b70d1ae21863bd3651b86c14e2f622714117b5526520
font_01_sfnt_off00012e06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E06 10480 bytes
SHA-256: 0dc6a42586cf4b65f6ebd65bf65dd5c31a6418d287d03c786149d3b2725a58a2
font_02_sfnt_off000145a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x145A7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.