Malicious PDF — malware analysis report

Static analysis result for SHA-256 2dffe48615fb08c6…

MALICIOUS

PDF

92.0 KB Created: 2021-06-28 02:15:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 4ced11d59a8d361c7b98714f6c09bff8 SHA-1: 7a2f90572f41b04e2de6ffd6a5004996898c192f SHA-256: 2dffe48615fb08c633e3e71eb568a5fac2657bb6013a12691468c5f9b9539c63
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded JavaScript stream and numerous external URIs, many of which point to compromised WordPress sites acting as link farms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The embedded JavaScript could be used to further obfuscate the malicious links or initiate a download.

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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/160b84ebfd5952---zilefevasamadix.pdf
    • http://www.tsssport.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b674bb35128---41698782914.pdf
    • https://www.makathastaliklari.net/wp-content/plugins/formcraft/file-upload/server/content/files/16083b302be6ae---jezagulevon.pdf
    • https://www.keystonecare.co.uk/wp-content/plugins/super-forms/uploads/php/files/364dbc59883faac7260dbb8eb3cc062c/95758578295.pdf
    • http://asirius.su/wp-content/plugins/super-forms/uploads/php/files/2ff8e065761318fcabb03190ff3d8df0/nupologabibopumirufar.pdf
    • https://georgiamusicpartners.org/wp-content/plugins/super-forms/uploads/php/files/cae0a00ce276474e88b430abb331b26b/sozedazeporugi.pdf
    • https://dmvassociates.com/wp-content/plugins/super-forms/uploads/php/files/bbfd70cc0f31b0e20b3cc52e067770cc/nenazilevide.pdf
    • http://camonetinternational.com/files/file/55521821652.pdf
    • https://www.popcaffe.it/wp-content/plugins/super-forms/uploads/php/files/403e15be5cb3ae3cff619d97477d9b4a/43996340770.pdf
    • https://gofropack.com/wp-content/plugins/super-forms/uploads/php/files/eaa5f80083209a0ac15b19924c4bf7f6/80281185172.pdf
    • https://www.nuyew.academy/wp-content/plugins/super-forms/uploads/php/files/d41c86034cc2e0ccd7150ebbf1fdfa01/togubofebezaxo.pdf
    • https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606f6e6c1bb41---wivogezi.pdf
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7d3f47c25b---76821378008.pdf
    • http://beijingxinzhi.com/userfiles/file/20210522064756_620636415.pdf
    • http://ekotop.eu/userfiles/file/66173055148.pdf
    • https://www.hinogas.com/wp-content/plugins/super-forms/uploads/php/files/ki9fu69b0flqnd5en6nob3lum9/losibogagojopil.pdf
    • https://growmytruck.com/wp-content/plugins/super-forms/uploads/php/files/edf999cfc1ae0ac18706c94f93378b41/64229680532.pdf
    • https://extremetour74.ru/wp-content/plugins/super-forms/uploads/php/files/52f342877ce918ff4d95a043aabd1fbe/96909158626.pdf
    • https://nobleanimalsanctuary.org/wp-content/plugins/super-forms/uploads/php/files/tmp/58777997967.pdf
    • http://aire-limpio.com/img/editor/file/43447139702.pdf
    • http://csc0351.com/userfiles/file/20210621021944_aheh8y.pdf
    • http://erfaspot.com/resimler/files/92193280811.pdf
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607a8397490fb---51571454414.pdf
    • http://classiccar-jp.com/js/upload/files/38189771818.pdf
    • https://burragebrothers.com/demo/jolie/beta/userfiles/files/fipozuvamudovuwiduzeki.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=ellipse+oval+difference
    • 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_off0000fd49.bin
bc6f7a112561809d4d100d3ec6a59e545312bb366f3e3bc7db59bc2bec62ba96
pdf-font-stream PDF embedded font (sfnt) at offset 0xFD49 10564 bytes
font_01_sfnt_off0001157d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1157D 16792 bytes
font_02_sfnt_off00012d8f.bin
2e3bd67314912d64b72a71c49221654ef3c50a4c176ca491cac6d0432e9afd43
pdf-font-stream PDF embedded font (sfnt) at offset 0x12D8F 19960 bytes