Malicious PDF — malware analysis report

Static analysis result for SHA-256 7faa968c14a9a667…

MALICIOUS

PDF

101.0 KB Created: 2021-07-03 08:50:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8f37bbfc3a40cd74ba0c05e0f908f64a SHA-1: e4e815e465375beb559dcc92e482ab96b4595884 SHA-256: 7faa968c14a9a66736ae46dbf3a09f49d85c25595b046c11b3b2fd01ae2513c3
156 Risk Score

Malware Insights

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

The PDF file contains numerous external URIs and link farms, many of which point to compromised WordPress upload directories. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The file's structure and numerous links suggest it is designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9847

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://jointrilogy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b3f29ba41f---1004742358.pdf
    • https://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160bc55f497260---depebotilovap.pdf
    • http://www.rkcomdesignservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d35ccb510e---wezotixezevodexit.pdf
    • http://temple.mo/userfiles/file/rukibutisisuxonujitetumib.pdf
    • https://agermag.ro/mm/file/mogolisotekowefalixuruduz.pdf
    • https://profbuhotchet.ru/wp-content/plugins/super-forms/uploads/php/files/243b9dccc5917df0140e981fd74026dd/86076683989.pdf
    • http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/2qo6138dhaom20211nsf6gi496/vajawovunasabapekudafikog.pdf
    • http://hasyo.net/files/file/wenilujir.pdf
    • http://beckydavidsonhomes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081d793c3d01---12702714612.pdf
    • https://kimtuong.vn/isc/public/files/fckupload/file/dujorafuzabivizixomuniwul.pdf
    • https://akapacha.com/userfiles/file/80339475291.pdf
    • http://skyline1968.com/clients/74864/File/tifaraludumebofexo.pdf
    • http://ahlhy.com/uploads/file/060306257689.pdf
    • https://homeaestheticsllc.com/wp-content/plugins/super-forms/uploads/php/files/ca9eab74bc9ffcb9e50f880d9e30afb8/18381636088.pdf
    • https://www.ndgai.com/wp-content/plugins/super-forms/uploads/php/files/gg2llrv8bofv4fmip8lfcs3tre/gebisaranidifobaxeladazet.pdf
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081789098feb---zosuvavajokonu.pdf
    • http://itaindustrial.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a2a2d44335f---41608680532.pdf
    • https://www.davidcosz.de/wp-content/plugins/super-forms/uploads/php/files/8k3stia0etma7p4j091qinul0n/99111248071.pdf
    • https://mattweidnerlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096589424737---10795995351.pdf
    • https://ntwbearing.com/UserFiles/File/nifovokamubikipawuzavote.pdf
    • https://legacydockandmarine.com/wp-content/plugins/super-forms/uploads/php/files/680595d9f711d1354282e80c50b53048/vutubo.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=sidle+up+to
    • 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00011335.bin
d9f5e66163d907df9b2c2f031b8906ab183602eda4757f3e8ef428a9cf922d60		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x11335 18328 bytes
font_00_sfnt_off0000ee45.bin
b45ef3359580f38d562512ec71c9dfaa483b83913a26de2c7b03488d8df6b8a9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEE45 3840 bytes
font_01_sfnt_off0000fcdf.bin
7d9471028ae7889e1fc51c0947a8fcd43e9792546d50cc91358188f4272b3c2c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFCDF 10024 bytes
font_03_sfnt_off000130d2.bin
85bc3c7f93a8b838eca5760563d16c60eb821df109d32dee6fc5778002920ad8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x130D2 26124 bytes
font_04_sfnt_off00016e37.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16E37 16792 bytes

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