Malicious PDF — malware analysis report

Static analysis result for SHA-256 6086e7a16b7e8cb1…

MALICIOUS

PDF

83.9 KB Created: 2021-07-13 01:19:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 70c50d03d23767876c9a63097d0a3bca SHA-1: 92942a6d7fe80ee98f7433e4317372775d98097e SHA-256: 6086e7a16b7e8cb1c22219e8c0d1fb6f75cb23a6e237413b4f54d39b9b6d5c96
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF document contains numerous links pointing to compromised WordPress sites and disposable hosting domains, indicating a likely attempt to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, consistent with a phishing or malware distribution campaign. No scripts were extracted, but the presence of embedded URLs and the link farm structure are primary indicators of the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://irlanc.ru/uplcv?utm_term=if+we+mix+red+and+blue PDF link annotation
    • http://t-p-fortune.com/userfiles/file/26539164717.pdfIn PDF document text
    • http://belloverde.net/emailer/file/solarirugujuwasodisapumut.pdfIn PDF document text
    • https://www.nuyew.academy/wp-content/plugins/super-forms/uploads/php/files/cce0bda9049d64209661571efa91db4e/kilakezezasizosoveve.pdfIn PDF document text
    • https://stagerightstaging.com/wp-content/plugins/super-forms/uploads/php/files/3017aae5f025faccb8ddc0dfc641a320/temul.pdfIn PDF document text
    • https://trimix.bg/UserFiles/File/6008271312.pdfIn PDF document text
    • http://www.everhouse.lt/wp-content/plugins/formcraft/file-upload/server/content/files/160a1e881f244d---48088875094.pdfIn PDF document text
    • http://informerfitness.com/wp-content/plugins/super-forms/uploads/php/files/21f8cf7f37d425773831ab7b292438e9/59649727973.pdfIn PDF document text
    • https://mymango.ru/wp-content/plugins/super-forms/uploads/php/files/74cf3e9114885f87f5504ff8a75c0aaf/wemosozuj.pdfIn PDF document text
    • http://boulderdivorcelaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081116fb86f2---91810406023.pdfIn PDF document text
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/537bb6384c1efef35b1bf79201ce56f0/refenevanedixudilobu.pdfIn PDF document text
    • http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/fkr4c42alhjust8jm6tb47pkt5/61590270394.pdfIn PDF document text
    • https://t2sc.me/userfiles/58937062864.pdfIn PDF document text
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/616227a6d0975dc35105b3402075c9e4/xuvenekegimurepujiwir.pdfIn PDF document text
    • https://auf.vn/wp-content/plugins/super-forms/uploads/php/files/euf5r1a4et0nshvhcqarh051v0/bomuzawewid.pdfIn PDF document text
    • http://dailitara.lt/bites/uploads/file/sovop.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a961dd58804---xaxewimo.pdfIn PDF document text
    • http://lalitas-thaimassage-spa.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607b681c17cbe---10773670884.pdfIn PDF document text
    • http://28777886.com/Lpf/UPFILE/userfiles/files/11007360109.pdfIn PDF document text
    • https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607dd1a2a25fb---12902326161.pdfIn PDF document text
    • http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16099aa329d6e0---30786763094.pdfIn PDF document text
    • https://atolab.it/wp-content/plugins/super-forms/uploads/php/files/89063ee6276bb955be9ce47e65804ec9/lereden.pdfIn PDF document text
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/83e5c61bdc23ffb7ea14b2ba364015d9/gidodipevivajoxixoxeweb.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

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_off0000e605.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE605 17132 bytes
SHA-256: 63a24ccb112935efcfb3508b2cd0fb90882a17759d462abd0ed87a23ae674c8f
font_01_sfnt_off000112fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112FC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012b13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B13 10508 bytes
SHA-256: e5f2feed0a3f0e1af4142040076bddc17bec7439f68477a28153bf62641830b0

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