Malicious PDF — malware analysis report

Static analysis result for SHA-256 97b1bd92030b6e56…

MALICIOUS

PDF

54.7 KB Created: 2021-09-20 13:22:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 1545d06d3e07c472169946a6d195866d SHA-1: d71d836fa8de4f37f0e8dc409fa270ee175a9643 SHA-256: 97b1bd92030b6e5616212ed50f508728c9972bebfe6f391dd37d2a55d329fd77
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file functions as a link farm, containing numerous URLs pointing to potentially compromised websites or disposable hosting. The presence of 'utm_term=porno+apk+app' suggests a lure for potentially unwanted applications or phishing. ClamAV detection and ML classification confirm its malicious nature, likely serving as a phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7719

Heuristics 5

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://infrive.ru/uplcv?utm_term=porno+apk+app PDF link annotation
    • http://maxidmum.com/images/upload/fck/file/mevabiresajinevuwuwun.pdfIn PDF document text
    • http://lechioutdoor.com/userfiles/file/xofepikawejimodekora.pdfIn PDF document text
    • http://halongbaycruises.org/upload/files/simaduletufepajurumavukor.pdfIn PDF document text
    • http://cokhixnktientien.com/Images_upload/files/84273924198.pdfIn PDF document text
    • http://ebonit.light.bg/includes/libs/ckfinder/userfiles/files/remigusekunexenij.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136bfdc55f00---sipojojug.pdfIn PDF document text
    • https://asmitahrgroup.com/ckfinder/userfiles/files/96873985633.pdfIn PDF document text
    • https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/161349dbbc8dbc---99521349653.pdfIn PDF document text
    • http://bielle-srl.com/userfiles/files/kebulep.pdfIn PDF document text
    • https://stallion-international.com/userfiles/file/bokamisazebigokulufovafu.pdfIn PDF document text
    • https://foulardfotografando.it/file/wakasodot.pdfIn PDF document text
    • https://aimhc.com/userfiles/file/zedifiravupifulolego.pdfIn PDF document text
    • http://polaryachts.com/res/wysiwyg/file/72244587438.pdfIn PDF document text
    • http://limobebe.com/userfiles/files/33857855612.pdfIn PDF document text
    • http://manvilastrust-org.bvirani.com/ckfinder/userfiles/files/90771224998.pdfIn PDF document text
    • http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613baea626292---risewagexanufuzavituxisu.pdfIn PDF document text
    • https://fanaf.org/article_ressources/file/90845083154.pdfIn PDF document text
    • http://scro.ru/pic/file/68416051149.pdfIn PDF document text
    • http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16143930c55842---42734423451.pdfIn PDF document text
    • http://ppogrimall.com/upload/editor_image/file/migiradufewevaza.pdfIn PDF document text
    • http://xn--oy2b19v1mb1yi.com/userfiles/file/vabojitorifativobilozil.pdfIn PDF document text
    • https://braveathlete.net/geektic/files/sudapifufotijojuladefat.pdfIn PDF document text
    • https://sketchup360.vn/wp-content/plugins/super-forms/uploads/php/files/ke3q37he1j84jl8sb4bhadhcqi/mukuzinuvikelediwerem.pdfIn PDF document text

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