Malicious PDF — malware analysis report

Static analysis result for SHA-256 6417ef6601d711c1…

MALICIOUS

PDF

84.9 KB Created: 2021-08-25 03:59:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 7942d8109e4f9878e99a6617d6cf7ace SHA-1: 182dcc9428c4bc6425e21159e699285417874379 SHA-256: 6417ef6601d711c1b4f2726a6bf1f839f71da943966233a5e01dba20bcf96b67
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for executing malicious code. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' and the numerous extracted URLs indicate a link farm designed to redirect users to potentially compromised or malicious sites. ClamAV detection and ML classification strongly suggest malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://angkorphotographyguide.com/userfiles/file/reruxanezif.pdf In PDF document text
    • https://ozmutludokum.com/userfiles/file/bazivete.pdfIn PDF document text
    • https://mtmnetwork.net/uploadEditor/files/61634751088.pdfIn PDF document text
    • https://zionapostolicministries.org/uploads/file/44468244077.pdfIn PDF document text
    • http://driver-jazda.pl/upload/file/99215246393.pdfIn PDF document text
    • http://rafaelokazakov.com/file/41722570159.pdfIn PDF document text
    • https://economiadecomunion.net/ckfinder/userfiles/files/vamuweva.pdfIn PDF document text
    • http://tecsun-moscow.ru/docs/file/rodaj.pdfIn PDF document text
    • http://28777886.com/Lpf/UPFILE/userfiles/files/mujofazekukikuxesam.pdfIn PDF document text
    • https://malimbe.africa/wp-content/plugins/super-forms/uploads/php/files/cc178088f123e44f993dd1f04730c320/39659477689.pdfIn PDF document text
    • http://wksx.top/images/userfiles/file/pobekowokesovamoneluzej.pdfIn PDF document text
    • https://shih-tzu.ro/files/file/52450915036.pdfIn PDF document text
    • https://laetitiabernard.fr/images/file/gugilexoxap.pdfIn PDF document text
    • http://ekolojikweb.net/upld/userfiles/file/rugosumuzokas.pdfIn PDF document text
    • https://fellowpeo.com/wp-content/plugins/super-forms/uploads/php/files/33c7dfae5a7c4354e997516d7c940064/lapagexatigaxuxaj.pdfIn PDF document text
    • https://malimbe.africa/wp-content/plugins/super-forms/uploads/php/files/6e67c453ee2b8291fff17f29fd3302be/kebumak.pdfIn PDF document text
    • http://piannocreativo.com/js/new/fckeditor/userfiles/file/zufetutipapamototupor.pdfIn PDF document text
    • http://spielundlicht.de/content_provider/documents/files/mibamesoxeduranewof.pdfIn PDF document text
    • http://sowitech.vn/upload/files/59620223131.pdfIn PDF document text
    • http://www.suffaheducation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bdc2640f955---pulam.pdfIn PDF document text
    • http://grani-tonkogo-mira.ru/wp-content/plugins/super-forms/uploads/php/files/60cecdc45445bf82b01b0cd0bf1aba14/wijotojatewanaro.pdfIn PDF document text
    • http://hometextiles-consultant.com/ckfinder/userfiles/files/vizivarosal.pdfIn PDF document text
    • http://szao-spb.ru/images/news/file/mesubogerejilekenot.pdfIn PDF document text
    • http://barsugo.com/ckfinder/userfiles/files/42060421609.pdfIn PDF document text
    • https://krimgranit.ru/wp-content/plugins/super-forms/uploads/php/files/75d14effd0d95557e5b772a721da1115/wumusofolef.pdfIn PDF document text
    • http://hutbephottaihaiphong24h.com/upload/files/fawanesafevefopav.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=easy+hikes+bend+oregonPDF 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e700.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE700 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ff17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF17 10712 bytes
SHA-256: bd70428b5993a81c12210aa9ac479bf570c912e024ff9fbf015533735ab2f1db
font_02_sfnt_off00011765.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11765 17344 bytes
SHA-256: 45f9639f8d432e10ff1bea0d6a875fae3ae0457f0d7185f3bbdacb0a312f4eb5