Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ebc98549b4b2c5c…

MALICIOUS

PDF

87.6 KB Created: 2021-06-26 18:52:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3bf89c2a7385a00f01774a17b84b3be7 SHA-1: cc7d8fff32d9ce51b1e9ce65060e48fb83be2a6f SHA-256: 5ebc98549b4b2c5cf29d12382eb1f8f85f9b2a8bbc7e2e685781cff5fb4942d4
196 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1566.001 Spearphishing Attachment

The PDF contains heuristics indicating it is a link farm and a lure for command execution, instructing users to copy and paste content into a shell. This strongly suggests an attempt to trick the user into downloading and executing a secondary malicious payload. The ClamAV detection and ML classifier further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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 https://outsourcedbackoffice.co.uk/wp-content/plugins/super-forms/uploads/php/files/e816d31b551d5a96098069b0f5ef42ee/703058755.pdf
    • http://bpabv.nl/uploadfiles/file/wipuzep.pdf
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/1e8f4393791e7d3f7c4477468cd8eb89/53099542683.pdf
    • http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/160760ce86629c---73652586814.pdf
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1607da52693d17---25865692436.pdf
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607677701001b---tavosemebepudetazak.pdf
    • https://bonafideonline.com.ar/wp-content/plugins/super-forms/uploads/php/files/4eae3c203a37975a83765f09c7a4a84d/23525900789.pdf
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc4759cda9d---92297813278.pdf
    • http://workprohealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085110af1deb---7484195340.pdf
    • http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/78778ec2505d2dfa02ffa1c1d742fb33/38912300040.pdf
    • http://www.britocunhaadvocacia.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/160736764cd552---vazagerogifuke.pdf
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160bcfad223619---napisiwi.pdf
    • https://rhythmcprandfirstaid.com/wp-content/plugins/super-forms/uploads/php/files/2bec2fd886e8eaf522ac7b574487d9dc/31188508528.pdf
    • https://qamarapps.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e0a3e644fc---vuvosumexir.pdf
    • http://dodici12.ru/wp-content/plugins/super-forms/uploads/php/files/fu8uu4a003j513ofuu3setumv6/zilememimubujagavosili.pdf
    • http://shssailors1969.com/clients/3/36/366f78b21138e0f8005dfe6cc5e09e30/File/pegabigevul.pdf
    • https://insights3.com/wp-content/plugins/super-forms/uploads/php/files/8a54b77e96ae511759a5ce3a19f4c892/solamalovisawekozudofo.pdf
    • https://mymango.ru/wp-content/plugins/super-forms/uploads/php/files/cd6928a9ca2b91968c6f84ed045d8694/wutisewudevovewotidok.pdf
    • https://iominneapolis.com/wp-content/plugins/super-forms/uploads/php/files/546d28dd8ab048af121ec8928101a6fd/fokikiwugenewuvezi.pdf
    • http://bahtiyardishekimi.com/fckfiles/file/fipasebivaguxopujo.pdf
    • https://cristalparkhotel.com/ckfinder/userfiles/files/57935383916.pdf
    • http://applecentervn.com/uploads/image/files/kudadinekitezoluzifudin.pdf
    • http://southport1969.com/clients/861680/File/bijofegafudimomamorusika.pdf
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/50d36b4ff3ae42d66efff93437792621/minosade.pdf
    • http://autosoftware.company/autoresponders_images/files/15337959976.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=a+aa+telugu+movie+download+torrent
    • 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_off0000f369.bin
8a1fc6f32adee0e6c0f95fac99847643ad14e1a934fd2ad76965f03e717ae253
pdf-font-stream PDF embedded font (sfnt) at offset 0xF369 10656 bytes
font_01_sfnt_off00010b9e.bin
c9c7a9586e3019ce9a4befc5e6789a51a3c38632fd1d5b774451f07f7ef75938
pdf-font-stream PDF embedded font (sfnt) at offset 0x10B9E 17260 bytes
font_02_sfnt_off000138d7.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x138D7 16792 bytes