Malicious PDF — malware analysis report

Static analysis result for SHA-256 47149626029dd0a3…

MALICIOUS

PDF

75.3 KB Created: 2021-08-28 19:00:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: a3bc118d1572f309102f1495ae19e9e7 SHA-1: 32d59129bfce7a6a200c1788ab6b8e717184de49 SHA-256: 47149626029dd0a30cd5d7a9b764dbc4d9ba7815f056e6a61f786a99d240229d
156 Risk Score

Malware Insights

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

The PDF contains a link farm directing to multiple domains, many of which appear to be compromised CMS uploads or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the structure and URL analysis point to a malicious link distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://afslab.asia/upload/files/nuporasogelunegabubo.pdf In PDF document text
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160ec52c429024---30294307776.pdfIn PDF document text
    • http://slp72.com/clients/7/7b/7b902bee17765b19ebdde6030f24742d/File/faxusu.pdfIn PDF document text
    • https://kodeac.com/wp-content/plugins/super-forms/uploads/php/files/33edcl2ek5vchk8sba4ukvc651/72468372310.pdfIn PDF document text
    • http://ms-krmelin.cz/app/webroot/files/files/83244547365.pdfIn PDF document text
    • http://3wsystems.com/shipinc/userfiles/files/33281125486.pdfIn PDF document text
    • https://realestateconnect.biz/wp-content/plugins/super-forms/uploads/php/files/m8e9cbr7c62vor15482i0ilc41/41487047749.pdfIn PDF document text
    • https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/16087bb18ad8b3---72544315871.pdfIn PDF document text
    • http://www.jindatunnel.com/up_files/file/gilumibixodipobuxo.pdfIn PDF document text
    • http://vrakskodamnetice.cz/file/kizudunipuzexelopubibu.pdfIn PDF document text
    • https://digiconelectronics.com/media/turelukagabigedipud.pdfIn PDF document text
    • https://isleo.com/i_photos/file/1479746893.pdfIn PDF document text
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad2652bc158---53049158701.pdfIn PDF document text
    • https://hafa-verein.de/wp-content/plugins/super-forms/uploads/php/files/6179dae349fd1d1345c7ce806223096b/tanaxa.pdfIn PDF document text
    • https://earplighting.com/wp-content/plugins/super-forms/uploads/php/files/9fc8ab709620cd8beef26f2bea52b43f/gisiteratenirobog.pdfIn PDF document text
    • https://studio45.live/wp-content/plugins/super-forms/uploads/php/files/pjba2bgfum7m2lqndcq1lqcsqr/sisutabugelu.pdfIn PDF document text
    • http://www.prodomasa.com/ckfinder/userfiles/files/sebilizimakum.pdfIn PDF document text
    • http://aggengr.com/uploads/CMS/file/xulakilimija.pdfIn PDF document text
    • http://maximaviajes.com/FCKfiles/file/farufugem.pdfIn PDF document text
    • http://uceng.net/_UploadFile/Images/file/79735149614.pdfIn PDF document text
    • http://gancza.pl/userfiles/file/19896896670.pdfIn PDF document text
    • https://aksusu.com/upload/files/juduliviwiwafa.pdfIn PDF document text
    • https://bestcoloringpages.com/userfiles/file/99310758977.pdfIn PDF document text
    • https://people11people.gr/uploads/File/26445046686.pdfIn PDF document text
    • http://tischlerei-schlusche.de/sites/default/files/file/4529641996.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=unusual+fatigue+meaningPDF 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_off0000c79a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC79A 10444 bytes
SHA-256: 4d2219477da447a2ea0405e33f4380e445389f520deb734b6ecec9f2f8a683c0
font_01_sfnt_off0000df43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF43 15824 bytes
SHA-256: 3b61c885faa9e152cf63311c832791b24d3a3ac89e5e8f3593b1ebb18dff7587
font_02_sfnt_off0001076e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1076E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1