Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2adbae604e96ada…

MALICIOUS

PDF

57.0 KB Created: 2021-06-22 23:53:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: fca3cc03e7e4632de92423c279b0c144 SHA-1: 83177c42b734d325219801780786fa140ae829a3 SHA-256: b2adbae604e96adaa5ed97c78034e7040a1acc0d0d8d0e5b212711e5c34c0075
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and ML classifiers, indicating a phishing or trojan threat. It functions as a link farm, with numerous embedded URLs pointing to compromised WordPress sites, likely serving as a distribution point for malicious content. The presence of external URIs and link farm heuristics strongly suggests an attempt to lure users to malicious destinations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8828

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://crewmak.ru/uplcv?utm_term=pitagoras+pdf+filosofia PDF link annotation
    • https://mkting.com.co/wp-content/plugins/super-forms/uploads/php/files/3f8997bc657f1bff9fdd58231881f566/29960806805.pdfIn PDF document text
    • https://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f1f7f34c6f---69077991098.pdfIn PDF document text
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160ba90bab68c6---zulep.pdfIn PDF document text
    • http://inspiredindianfoundation.org/uploads/35296547144.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160909675edaf5---69379050526.pdfIn PDF document text
    • http://projectbudapest.hu/wp-content/plugins/formcraft/file-upload/server/content/files/1609d664e5e5fa---kuxivekupe.pdfIn PDF document text
    • http://www.tobywells.org/media/fckdir/file/18765578300.pdfIn PDF document text
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607fe785c5849---67316843741.pdfIn PDF document text
    • https://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d1ee4cb09e---89898832169.pdfIn PDF document text
    • http://bettynblue.com/upload/fck_img/20210510/file/99146442556.pdfIn PDF document text
    • https://glass-haus.ru/wp-content/plugins/super-forms/uploads/php/files/6941c781c918097a7017e41ec4f4ef95/fapunuradumazonizexunu.pdfIn PDF document text
    • http://say-international.eu/userfiles/file/fokibilarizedojabis.pdfIn PDF document text
    • https://xn--80aaa1anac6cg.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/84b5395432eabc4a47c65f9dc6eebb77/66885100614.pdfIn PDF document text
    • https://www.dolphinrfid.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c582db36db2---gabufokapopogewokored.pdfIn PDF document text
    • http://cdseoulps.com/uploadfile/fckeditor/file/36583712998.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/d4b3014a5efc3099c7e45574d31b2353/18852571961.pdfIn PDF document text
    • https://churchosonline.com/wp-content/plugins/super-forms/uploads/php/files/2f00cc5ebf079a210638cde1042e4a4b/86499361332.pdfIn PDF document text
    • http://autoshiftbid.com/fckeditor/userfiles/file/bowuzik.pdfIn PDF document text

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