Malicious PDF — malware analysis report

Static analysis result for SHA-256 47b647bfa91d0cf9…

MALICIOUS

PDF

86.0 KB Created: 2021-09-16 10:48:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: beda6374bca78e8d28e8ef8ea9fed53d SHA-1: 63a6ba49699c860258bdac8717b57bea5dbf11cb SHA-256: 47b647bfa91d0cf94aa0e983ac00a2e70c6e97d56a2e5e57ac5d55625a117abe
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised CMS upload directories and disposable hosting, suggesting a phishing or scam lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to malicious content or phishing sites. No scripts were extracted, and the document body was unreadable, limiting further analysis of the specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9848

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://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f4ff47c26d---58352763385.pdf
    • https://saksisan.com/upload/ckfinder/files/93276911812.pdf
    • http://shengnabei.com/uploadfile/file///2021091518483429.pdf
    • http://pjteam.hu/uploads/25845734036.pdf
    • https://www.isgs.org/wp-content/plugins/super-forms/uploads/php/files/af76e181d40f2ce353bea41659d6a6c8/vipizemifulikit.pdf
    • https://noithathoaphat11.com/upload/files/54739938436.pdf
    • http://playoz.com/ckfinder/userfiles/files/64850417708.pdf
    • http://newo.ru/files/files/tejodajasiminukuni.pdf
    • http://draftingfloorplan.com/ckfinder/userfiles/files/58185221352.pdf
    • http://hoanhaochemical.com/uploads/files/kitowaletilu.pdf
    • http://cesvil.it/filesUploads/file/15915279915.pdf
    • https://deycaterers.com/ckfinder/userfiles/files/10188624313.pdf
    • https://coloreverything.love/wp-content/plugins/super-forms/uploads/php/files/a1790e78a5dc0fbb04df16b860a5fa02/fibemomazij.pdf
    • http://johnlillylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/94103880676.pdf
    • http://thesecurityguardunion.ca/userfiles/files/tapubusakogajexiv.pdf
    • https://parc-hotel.info/file/kufijutotesikosirusoz.pdf
    • http://www.sport-konyv.hu/userfiles/file/rawakegomisifowiniroto.pdf
    • http://huichem.com/ckfinder/userfiles/files/99250973009.pdf
    • http://kanoonkaraj.ir/dbmanager/filebank/htmlgallery/file///26557032238.pdf
    • http://weshare.vn/attachment/files/87202346943.pdf
    • http://casavacanzesanvito.eu/userfiles/files/35589579299.pdf
    • http://hoteldanang.com/uploads/images/files/27987806846.pdf
    • https://refakatci.net/userfiles/file/65557947985.pdf
    • https://myclubowners.travelenvogue.com/userfiles/files/gelukagoxasagupak.pdf
    • http://fskyok.com/uploadfile/files/kurorojokiveberurepin.pdf
    • http://bronnicy.inhome360.ru/admin/ckfinder/userfiles/files/redexiruloduxeg.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=four+sided+shapes+with+equal+sides
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e840.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE840 16792 bytes
font_01_sfnt_off00010052.bin
b52a5e91c21f8706304156c8a23fe60fb253b194b539a902ef1e1aa470e85dfb
pdf-font-stream PDF embedded font (sfnt) at offset 0x10052 18944 bytes
font_02_sfnt_off00013208.bin
c4c0f55212e90199b8a9615dfb18c2ae4ebe822b0cd3175155e2f2738eefb1f0
pdf-font-stream PDF embedded font (sfnt) at offset 0x13208 10692 bytes