Malicious PDF — malware analysis report

Static analysis result for SHA-256 faa7ea7f4270cebe…

MALICIOUS

PDF

72.2 KB Created: 2021-06-24 18:45:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: cd8b52a81de15ce542a12f600d99a70d SHA-1: bf1f4f81cb17eed033503e7f6e0a5c79ae6a2f7e SHA-256: faa7ea7f4270cebe88cb018f14a7362cc2d60133a442f73d1fcc70438f1b3033
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was identified as malicious by multiple heuristics and an ML classifier, with ClamAV detecting it as Pdf.Phishing.Trojan. The document contains a link farm pointing to numerous unknown URLs, many hosted on compromised CMS upload storage, suggesting an attempt to redirect users to malicious content. The presence of these links and the overall structure indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9546

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
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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 http://fsgpj.com/upfolder/e/files/20210620234838.pdf In PDF document text
    • http://pusheng168.com/uploadfiles/20210619235650.pdfIn PDF document text
    • https://ipcare.nl/wp-content/plugins/super-forms/uploads/php/files/ad8emafjehhkcoaehqb7ssu6u5/97231531132.pdfIn PDF document text
    • https://brusroom.com/wp-content/plugins/super-forms/uploads/php/files/9471a3478abf8d3883a873b1e3273715/badipurubitozeriwow.pdfIn PDF document text
    • http://bettynblue.com/upload/fck_img/20210514/file/daxatelodopotesenidavodur.pdfIn PDF document text
    • https://bf-pomosch.ru/wp-content/plugins/super-forms/uploads/php/files/ld6moutsugmadfad8ckvjo9ep4/2506346492.pdfIn PDF document text
    • https://loctra.net/userfiles/file/71122228928.pdfIn PDF document text
    • https://www.audifonosdoshoydos.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa3a728993f---4975557332.pdfIn PDF document text
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a879d2cba70---xasozilirisaxeve.pdfIn PDF document text
    • http://kfbi.ru/content/file/70110310408.pdfIn PDF document text
    • https://agrachoff.ru/wp-content/plugins/super-forms/uploads/php/files/0d58a4e3460b773847e469f63934434e/24156482555.pdfIn PDF document text
    • http://themultifold.com/wp-content/plugins/super-forms/uploads/php/files/7s3ehlti905q04mdqvoub8hdr3/81913068473.pdfIn PDF document text
    • http://baovephuongtroi.com/vietkiendo/upload/file/xikisuso.pdfIn PDF document text
    • https://veritiesinstitute.com/wp-content/plugins/super-forms/uploads/php/files/7fa5129397576893948bfe164a1abbe2/14622467052.pdfIn PDF document text
    • https://aspaeng.com/files/image/files/tekebu.pdfIn PDF document text
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a38c71296aa---bepalefuzivagazuwakufa.pdfIn PDF document text
    • https://baconbites.com/wp-content/plugins/super-forms/uploads/php/files/78rg51o01dc37nr7qlcb043uq0/81329438609.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=apaharan+web+series+720pPDF link annotation
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d90d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD90D 5452 bytes
SHA-256: 64468790fcaa7694d11e879f0072756db0852653428bb6cc056779f4fd1e0d61
font_01_sfnt_off0000eba1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBA1 10724 bytes
SHA-256: 2ea134dcbda50f6e2b1cfd1593cbd3cce1e73e1c587e4f5b35a78d754a525f9c
font_02_sfnt_off0001105c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1105C 4480 bytes
SHA-256: c79b0b2fb5bd809b640ba46773318257a67b9c3f33cea666ab4ddcfe4a9c3d18

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