Malicious PDF — malware analysis report

Static analysis result for SHA-256 79dc3357a5fa2b00…

MALICIOUS

PDF

81.5 KB Created: 2021-08-07 15:23:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 74858e0730756ac20c3157e653ab1c7d SHA-1: 2c4d42a9bad66540a6bf68446c7fd5fb610e28de SHA-256: 79dc3357a5fa2b00ac24930039491358dd47bc84f7a90ae573115d22949d7225
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 malware distribution attempt. It functions as a link farm, containing numerous URLs pointing to potentially compromised websites or disposable hosting, designed to lure users into downloading further malicious content. The presence of external URIs and link farm heuristics strongly suggests an intent to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9944

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://smidgel.ru/uplcv?utm_term=air+navy+fighters+mod+apk+free+download PDF link annotation
    • http://sllight.ru/design/img/upload/file/lavuwiwe.pdfIn PDF document text
    • https://lacausedeslivres.com/userfiles/file/kelaxolovafusebaga.pdfIn PDF document text
    • http://penoplex24.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16075b74eb5c06---bafabivamunotomu.pdfIn PDF document text
    • http://ehomeforeclosure.org/images/file/wugexorawemu.pdfIn PDF document text
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9915765ef---degoxojolumagu.pdfIn PDF document text
    • https://purefeeling8.com/data/file/82269619427.pdfIn PDF document text
    • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/160adadb140b5c---64725748642.pdfIn PDF document text
    • https://n95america.com/wp-content/plugins/super-forms/uploads/php/files/4f9627a8d9d48a9b6d24e87b8aba8e28/benusejajomobexejagalob.pdfIn PDF document text
    • https://cristiandellavedova.com/wp-content/plugins/super-forms/uploads/php/files/sfkqfkhgivpoo103f2gad21p10/jusaxobe.pdfIn PDF document text
    • https://eqonetech.com/upload/userfiles/files/pejerojokam.pdfIn PDF document text
    • http://matstravel.ru/userfiles/file/sukefetusezikiwijimegu.pdfIn PDF document text
    • http://www.mearesandassociatesllc.com/siteuploads/editorimg/file/dunezijufebizojiwajega.pdfIn PDF document text
    • http://dush-kz.ru/uploads/fck/file/jaluvu.pdfIn PDF document text
    • http://alt-1c.ru/userfiles/file/tupukigoranukoro.pdfIn PDF document text
    • https://mmagame.com/userfiles/file/37988657386.pdfIn PDF document text
    • https://zoldlepes.hu/userfiles/file/ruxipawez.pdfIn PDF document text
    • https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b72a52f0329---35567532952.pdfIn PDF document text
    • https://frontiermyanmar.com/sites/all/libraries/ckfinder/userfiles/files/67285064848.pdfIn PDF document text
    • http://logtech.cz/foto/Image/file/pupepofebolideg.pdfIn PDF document text
    • https://cedarcreeksauce.com/wp-content/plugins/super-forms/uploads/php/files/af5b2fa8a6fe2b5636fb5492a1c3d869/fufuwulox.pdfIn PDF document text
    • https://spherule.org/wp-content/plugins/super-forms/uploads/php/files/e9e888714b1973ae39df8e10fb223000/41240596685.pdfIn PDF document text
    • http://itaindustrial.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b4c110755a2---52213436535.pdfIn PDF document text
    • https://www.chortho.co.uk/wp-content/plugins/super-forms/uploads/php/files/dcu4l7f11m3r08o6mmgsmmaekg/boxefowosidizemelapav.pdfIn PDF document text
    • https://www.breastcancerfoundation.in/wp-content/plugins/super-forms/uploads/php/files/6ae531a35e544c39d3f1b47e0af6b1c7/79174512952.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d173.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD173 1672 bytes
SHA-256: 3f1748778f03e7b7e2d3a6c88ca15ef060a02f224cd71155e662fde9dd4c56c7
font_01_sfnt_off0000d966.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD966 11284 bytes
SHA-256: dca5e3de90f5d4048287a6b6a391e4b219106f352fa31a77388cbfd813a1809c
font_02_sfnt_off0000f391.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF391 16860 bytes
SHA-256: be006383e61f4b665f085c5347e4cd92474da47972dbed653f4fc10e2f24d4c2
font_03_sfnt_off00011f7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F7E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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