Malicious PDF — malware analysis report

Static analysis result for SHA-256 fcfa93ce93363b2e…

MALICIOUS

PDF

88.0 KB Created: 2021-09-13 04:05:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: e0f7271187b0f8aa1f61c303ba7a2300 SHA-1: 56440dce500fd47255a736937dde4b63bb53a45b SHA-256: fcfa93ce93363b2ec0057fede622bd0a844dcbdb2b994f9786fa9c2bc25dafb1
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. Heuristics indicate the document functions as a link farm, directing users to multiple external websites, some of which are hosted on compromised CMS uploads. While no scripts were directly extracted, the nature of link farms in PDFs often leads to phishing or malware download sites, aligning with T1566.001 (Spearphishing Attachment) if delivered via email.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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 http://saint-party.com/media/file/zuvupamunojekupatudovalim.pdf In PDF document text
    • http://gfb.it/upload/fck/file/37569314960.pdfIn PDF document text
    • https://duragloss.pl/userfiles/file/78072496143.pdfIn PDF document text
    • http://ohmamakitchen.com/uploads/files/56274385320.pdfIn PDF document text
    • http://birizgardenhotel.com/userfiles/file/28869360113.pdfIn PDF document text
    • https://scout-educationguide.com/userfiles/file/21259348422.pdfIn PDF document text
    • http://raduzhniy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ed2ab8defd---medabaxegapuminoxe.pdfIn PDF document text
    • https://christembassybarking.org/wp-content/plugins/super-forms/uploads/php/files/19e74abb70bb8c05f439bc3abd15e1f7/dilazirunejegaradaruf.pdfIn PDF document text
    • https://hunglivet.com/uploads/files/202109070325358234.pdfIn PDF document text
    • https://www.xcelsus.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613526a911e74---32576939754.pdfIn PDF document text
    • http://photonart.nl/phpcmsys/file/nexolananekimejotu.pdfIn PDF document text
    • http://hlqh.net/userfiles/file/20210903184327_746813679.pdfIn PDF document text
    • https://mountainbrookbuilders.com/home/mountain/public_html/ckfinder/userfiles/files/86720329253.pdfIn PDF document text
    • http://makassitools.com/userfiles/file///kikunufuje.pdfIn PDF document text
    • http://xn----7sbjvweekof5d.xn--p1ai/files/files/parizapavepiberagimi.pdfIn PDF document text
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/bc1545d7d195276e1ca3d9ce22048b7e/17837007901.pdfIn PDF document text
    • https://portsidestrategies.com/wp-content/plugins/super-forms/uploads/php/files/4a2f5f6ea4d07cb6b2d32f7b37450455/9866338240.pdfIn PDF document text
    • http://topspeed4wd.com/ckfinder/userfiles/files/57832323522.pdfIn PDF document text
    • http://theofficefurniturestore.com/ckfinder/userfiles/files/68463769317.pdfIn PDF document text
    • http://sissonne.hu/editor_up/38949490331.pdfIn PDF document text
    • http://bagandpack.ru/wp-content/plugins/super-forms/uploads/php/files/d9e7dc700e3218acbeeecce4430d3582/madutinufetolalevi.pdfIn PDF document text
    • http://smartraoptics.com/fck_filemanager_upload/file/42762605023.pdfIn PDF document text
    • http://i-p-p-c.com/ckfinder/userfiles/files/44729996228.pdfIn PDF document text
    • http://web-news.eu/www/pkpar/userfiles/file/93462944893.pdfIn PDF document text
    • https://sikahaiphong.com/images/news/files/subiwilepatuwuke.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=best+photo+template+app+androidPDF 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_off0000f432.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF432 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010c44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C44 17728 bytes
SHA-256: f1ac2285f21f072cd3fb801edb7c8b527054060dd50b8dd9f8563237cfa8e631
font_02_sfnt_off00013a12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A12 10712 bytes
SHA-256: c9dee37e7ffdce5f8af9aef9723bf1450df42d9a64a3a3b583aa3eb7f38f2603

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