Malicious PDF — malware analysis report

Static analysis result for SHA-256 47e4d56d77eacb1d…

MALICIOUS

PDF

85.1 KB Created: 2021-09-16 01:18:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: bd95f71b9d6ac57aca1a2162a4ac497c SHA-1: 2a2bae950cf135795f4242d1baffeed970a2c561 SHA-256: 47e4d56d77eacb1d5a97768c4a04d41aba06bb08d68a1b593ede9515c10d02e0
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple heuristics indicating it is a link farm, with several URLs pointing to compromised CMS uploads and disposable hosting. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with attempts to lure users to download malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://bcslaw.hu/admin/fck_upload/file/81183505008.pdf In PDF document text
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/161343cb5f029c---15634530808.pdfIn PDF document text
    • http://tce.vn/imagesflashupload/file/vepomasemepaxesonorinekod.pdfIn PDF document text
    • http://kondicionery-domodedovo.ru/upload_picture/file/69720127471.pdfIn PDF document text
    • http://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1613b0f666b63f---gozojesojo.pdfIn PDF document text
    • https://infotechloyalty.com/bot/ckfinder/uf/files/zasefigilugijeturigaraxum.pdfIn PDF document text
    • http://sushikyototogo.com/uploads/files/jagegifusiruwat.pdfIn PDF document text
    • http://batterseataxi.com/survey/userfiles/files/jozatolekabumuvapapemelad.pdfIn PDF document text
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613726860b1d4---26477571416.pdfIn PDF document text
    • http://swotaweb.com/img/upload/file/nanubupedajojowonawep.pdfIn PDF document text
    • http://lixupeng.com/uploads/files/42287873807.pdfIn PDF document text
    • http://ristoranteyuri2.com/userfiles/file/73045532214.pdfIn PDF document text
    • https://speedwayinfo.hu/uploads/file/66204987549.pdfIn PDF document text
    • http://technestudio.eu/userfiles/files/jukipizivexowupese.pdfIn PDF document text
    • https://kltccompany.com/ckfinder/userfiles/files/zegedisujivoguxeno.pdfIn PDF document text
    • https://adverto.ee/userfiles/file/34238080735.pdfIn PDF document text
    • http://leadershipcareer.kr/fckeditor/_upload/file/92647778378.pdfIn PDF document text
    • https://panificioilcavaliere.it/userfiles/files/lalisotaxunenifo.pdfIn PDF document text
    • http://angelofthewinds.net/ckfinder/userfiles/files/purifekuxalonerudikiwut.pdfIn PDF document text
    • http://alles-vom-schreiner.de/userfiles/file/59980277519.pdfIn PDF document text
    • http://xn--80aaeiengkwpz6p.xn--p1ai/pub/file/2867985870.pdfIn PDF document text
    • http://diegogenna.it/userfiles/files/15730814016.pdfIn PDF document text
    • http://aquatherm-graz.at/files/98342491470.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=sapthamashree+thaskaraha+full+movie+download+720pPDF 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_off0000e62d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE62D 17452 bytes
SHA-256: a188047de448bedd5f485ba4e9b9bc3a13e06ead1689e076fbbc5d8ea5137345
font_01_sfnt_off00011347.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11347 11476 bytes
SHA-256: 4529d77472395bf0103477b2d8dfb51cf3e7a8cdbb4dfd6994c50a9105d3fe45
font_02_sfnt_off00012e5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E5C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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