Malicious PDF — malware analysis report

Static analysis result for SHA-256 3382c19b94d153fa…

MALICIOUS

PDF

70.3 KB Created: 2021-09-03 00:18:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6811282f706476a2a5fc912b53f197af SHA-1: 2bf529acfaae66361888934571465e00fb787ac4 SHA-256: 3382c19b94d153fa4abe6bfcf1ff365331448378e041140540f70d0dc31b4475
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to potentially compromised or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or SEO abuse. The presence of a link farm suggests an attempt to redirect users to malicious sites or to manipulate search engine rankings.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9959

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://prosquash.by/data/zadozasujonuko.pdf
    • http://abwfinlay.com/uploads/files/sumififibanabezom.pdf
    • https://gofropack.com/wp-content/plugins/super-forms/uploads/php/files/06a44b2b8d6dd26ff128232b0b9e655f/17900159913.pdf
    • http://spostojow.pl/userfiles/file/92432037989.pdf
    • http://nomaquito-travel.com/editor-images/13877851483.pdf
    • http://bodymindspiritconnection.org/clients/5/53/53f1eac0d8ee32431a47b4e1af774f29/File/geruwozasasozur.pdf
    • https://mytopics.it/uploads/file/niwasabipokunoxobavefos.pdf
    • http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca91e21dcb---63554478973.pdf
    • http://eko-inwest.eu/upload/file/73097050950.pdf
    • https://magyar-logyogyasz.hu/fileok/file/mebeb.pdf
    • https://merohamro.com/ckfinder/userfiles/files/kekadabofopuvujexoses.pdf
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/160cfdea48c68e---dokiwawim.pdf
    • http://firewaterdamagedfw.com/test/fckeditor/uploadfiles/file/bigig.pdf
    • http://anhuishangbiao.com/upload_fck/file/2021-8-15/20210815005258501831.pdf
    • https://www.cukoyem.com.tr/wp-content/plugins/super-forms/uploads/php/files/386aknrujo39420086gv6rs0e2/jaxodevowuvupubexom.pdf
    • http://xn--zb0by3yusal20ak5lcidnwigi.com/ckfinder/userfiles/files/1627800290.pdf
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/468f21c014ca620e6846b0d03f9bee1f/24375030250.pdf
    • https://grandplaza.bg/uploads/assets/file/ramilitadu.pdf
    • https://riwg.in/userfiles/file/buxuzozamafabuvokeronut.pdf
    • http://burragebrothers.org/demo/jolie/beta/userfiles/files/kimesovomanofare.pdf
    • http://www.grupoaccs.net/ckfinder/userfiles/files/34096848311.pdf
    • https://curryleafharleysvillepa.com/hang/userfiles/files/budilezitifa.pdf
    • http://www.homefacelifters.com/wp-content/plugins/super-forms/uploads/php/files/dd486242e3e4f88e5a03bbc19c4059e3/90696339317.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=boogie+nights+musical+script+pdf
    • 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_off0000b0f5.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xB0F5 16792 bytes
font_01_sfnt_off0000c907.bin
4c61abe406815be87d58200596a9a604421c36d075a15c3712bb1dc37bff2957
pdf-font-stream PDF embedded font (sfnt) at offset 0xC907 15520 bytes
font_02_sfnt_off0000f082.bin
dcc2f4fa00eb11f2ce88277e64b27525610dfbdc7521b8fb15886b9be291ac47
pdf-font-stream PDF embedded font (sfnt) at offset 0xF082 11220 bytes