Malicious PDF — malware analysis report

Static analysis result for SHA-256 62c47c47924cb23c…

MALICIOUS

PDF

146.3 KB Created: 2021-07-17 23:43:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: f68a1ce46eca29bd9dc7d9dd7a5c8c3a SHA-1: 02835af483d2cd0f3de758a28853b66827c7fa7c SHA-256: 62c47c47924cb23cd0833731be3049226db8a2670da3cecc592a9f4260323536
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a large number of links, many pointing to compromised WordPress upload directories, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent. No scripts were extracted, but the structure and URL patterns are indicative of a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9941

Heuristics 6

  • 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
  • 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://zweiund40.com/wp-content/plugins/super-forms/uploads/php/files/kc4q1canct7ic9j8mq705n16q4/mepit.pdf In PDF document text
    • http://www.christinemartin.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16080ee441c77d---73323160378.pdfIn PDF document text
    • http://gulfcoolcontracting.com/uploads/userfiles/file/file/58546757535.pdfIn PDF document text
    • http://itnetworkconsultingsf.com/helpdesk/app/webroot/img/userfiles/files/92444231668.pdfIn PDF document text
    • https://ajitcoatings.com/uploads/wuwifomojuwa.pdfIn PDF document text
    • https://www.higher-energy-trampolineclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079f28439bef---94712251479.pdfIn PDF document text
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d61c0725458---nukagowareju.pdfIn PDF document text
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cea37a13fde---65513781529.pdfIn PDF document text
    • http://mingmitrcoffee.com/user_img/files/79296584528.pdfIn PDF document text
    • http://theopenhouseclub.com/wp-content/plugins/super-forms/uploads/php/files/b6a0ff68558377f75cbc9296b682c94c/94671808597.pdfIn PDF document text
    • http://sitepride.com/clients/c/c8/c8c605999f3d8352d7bb792cf3fdb25b/File/28400421364.pdfIn PDF document text
    • http://psychoterapia-przemysl.net/img/userfiles/file/67972424688.pdfIn PDF document text
    • https://tucsonhomewindowtint.com/wp-content/plugins/super-forms/uploads/php/files/e7e308cb3d666349b1d701d937b04d52/rubowumanened.pdfIn PDF document text
    • http://studio-castiglioni.com/userfiles/files/xipaxibusarudenomoxobujow.pdfIn PDF document text
    • http://jtour.vn/userfiles/file/39954147077.pdfIn PDF document text
    • https://bednidhitraders.com/userfiles/file/xiwadudowufulivaxuzazi.pdfIn PDF document text
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc51762067---sobubatosup.pdfIn PDF document text
    • http://aisef.org/uploads/userfiles/file/file/4883079257.pdfIn PDF document text
    • https://comesa.com.pe/wp-content/plugins/super-forms/uploads/php/files/qp06njpcooerj3ak0su1n7p8u1/13201067435.pdfIn PDF document text
    • https://theelementrama9.com/userfiles/files/pesuxosafezepurutogaluk.pdfIn PDF document text
    • http://kamarkosong.com/contents//files/32976105354.pdfIn PDF document text
    • https://nothingbutsafetyglasses.com/userfiles/file/84737424281.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=spectral+clustering+applicationsPDF 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_off0001d90b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D90B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001f122.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F122 10724 bytes
SHA-256: 7588475624feeee9f79bb7096403a0f8f3e8bcf3670ede5ff8673e70213154a9
font_02_sfnt_off000209da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x209DA 19644 bytes
SHA-256: d6dfd6d33b163e01e90d9a8606a11202a210f24264a959814dfe1f701642126f

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