Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f6ff1ad4bf0f6b1…

MALICIOUS

PDF

93.0 KB Created: 2021-08-05 08:09:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: fd11a8a31cae16ce4bac3520a1df9239 SHA-1: 7a20d205ad0e89277bd7b1faef7f08eded4c9d4f SHA-256: 7f6ff1ad4bf0f6b1fc4e6a41b9abab29aa8d8639e0d499c02431e74882a50175
156 Risk Score

Malware Insights

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

This PDF was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous links, many pointing to compromised CMS uploads and disposable hosting, suggesting it's designed to lead users to malicious sites. The embedded URLs and link farm heuristics indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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 http://melissajacksonmd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b0b00322d6---nijozuboxeb.pdf In PDF document text
    • http://www.tamtrebinhminh.com/public/files/panigobajivitidemilononu.pdfIn PDF document text
    • http://www.adatechotomasyon.net/wp-content/plugins/formcraft/file-upload/server/content/files/160aa86aa54106---dozeb.pdfIn PDF document text
    • http://karat-dobremiasto.pl/userfiles/file/bemuf.pdfIn PDF document text
    • http://www.rlktechniek.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607a1309882d2---mesipugakex.pdfIn PDF document text
    • http://moon-villa123.com/CKEdit/upload/files/62212003966.pdfIn PDF document text
    • http://caratow.nl/userfiles/file/39374312452.pdfIn PDF document text
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/16080e2fd917cd---68012540549.pdfIn PDF document text
    • http://duetsepolno.pl/userfiles/file/pexoniliwomak.pdfIn PDF document text
    • https://betonwerkendejonge.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160ee3c2fd7998---95225156076.pdfIn PDF document text
    • http://dissanna.com/temp/fckeditor/file/11114136468.pdfIn PDF document text
    • http://hublihorse.com/uploads/userfiles/files/kupepunonegam.pdfIn PDF document text
    • http://citralandpalu.com/new/pics/file/bamixafisonosexano.pdfIn PDF document text
    • https://zionapostolicministries.org/uploads/file/tixudek.pdfIn PDF document text
    • http://donkaew-furniture.com/ckfinder/userfiles/files/nifobakiguwixunotamur.pdfIn PDF document text
    • http://iphysiology.ru/upload/fozawubuv.pdfIn PDF document text
    • https://decoveinvestment.com/userfiles/file/kebajewejolepe.pdfIn PDF document text
    • https://markeishahall.com/wp-content/plugins/super-forms/uploads/php/files/f3f54a5db1269031db7307c0c8d75b6c/68228268061.pdfIn PDF document text
    • http://osc-pribor.ru/products_pictures/file/penuvojegisuzozipiwuvujof.pdfIn PDF document text
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608d1cd6ac32d---9119876397.pdfIn PDF document text
    • https://anfauglir.com/images/file/13224674516.pdfIn PDF document text
    • http://neoneofytou.com/ckfinder/userfiles/files/kitibixanitixananexan.pdfIn PDF document text
    • http://bafiti.com/sklep/userfiles/file/piduzitazosifati.pdfIn PDF document text
    • https://tkpmission.org/wp-content/plugins/formcraft/file-upload/server/content/files/16082eb7abe6e3---13974303951.pdfIn PDF document text
    • http://happyhanool.com/ckupload/files/fepesuxeza.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=how+to+download+barbie+dreamhouse+adventuresPDF 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_off0000fbb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBB3 10896 bytes
SHA-256: 708c92d1b0e0caf55e079672786fa1dd2875cde7cad7344f10c99cb9ffb92091
font_01_sfnt_off000114b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114B5 24768 bytes
SHA-256: d6d05e5709c0fac78c9a7dbb06dcf0dbb7982727be09f6e8e9feae74968ae4be
font_02_sfnt_off00014d88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14D88 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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