Malicious PDF — malware analysis report

Static analysis result for SHA-256 8047414b3ba67de0…

MALICIOUS

PDF

91.0 KB Created: 2021-07-02 16:27:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: fbfd0a44ff8ff736980984ba9afe8b30 SHA-1: 68ad0004ce8529c8863dc47b91f30d3211b7a8f9 SHA-256: 8047414b3ba67de0e551c4c2b2b124ea59b0bc16110f72aaf19573c01696367c
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, with many embedded URLs pointing to compromised WordPress sites and other potentially untrustworthy domains. The primary purpose appears to be directing users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://matstravel.ru/userfiles/file/17329574366.pdf
    • https://bykevin.com/wp-content/plugins/super-forms/uploads/php/files/e58b4ac259061f5f17d3c65912aec04a/jaxajibuda.pdf
    • http://brazilairporttransfers.com/ckfinder/userfiles/files/raziziweselapusugiwowum.pdf
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f1be83d159---zukudorariri.pdf
    • https://leo-translate.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/1607e2eb55159a---89439867466.pdf
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1608b33f0b8d05---fenutat.pdf
    • https://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/e0da915b29ab6d5b02c7e6615a3bf37c/rijutonajavodeboso.pdf
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a55d98b62a0---tojidunodixeva.pdf
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afae3a6ad75---24874104633.pdf
    • https://balajitutorial.com/admin/userfiles/file/todurexeberuzedaxemuxi.pdf
    • http://codienlanhminhquang.com/upload/files/27468921948.pdf
    • http://sanphamhanquocymy.com/uploads/files/gamifujukumozakodix.pdf
    • http://geologicatoscana.eu/userfiles/files/3171767264.pdf
    • http://whkmradio.com/userfiles/file/sidowede.pdf
    • https://hopefor.today/wp-content/plugins/super-forms/uploads/php/files/970ade15197b654f4af8d005c89186fe/lanodokis.pdf
    • http://www.nandomoraes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607b26c68c870---32204981107.pdf
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/tcb6sfccpeduprgsateutfcc51/59084648077.pdf
    • http://conelser.hu/fck_uploads/file/zaxazagolovotedimu.pdf
    • http://www.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8f7e4d706c---pijikipuzofetekuxozor.pdf
    • https://mokhalasati.com/userfiles/files/junumaredenu.pdf
    • http://lawrence-spruill.com/clients/42275/File/tavupofujewedutigolo.pdf
    • https://bayardplaza.co.uk/wp-content/plugins/super-forms/uploads/php/files/8a577snabm1ukprifr6db5rl48/45325121477.pdf
    • http://sevimticaret.net/userfiles/file/54958557379.pdf
    • https://www.sesc.com.ua/wp-content/plugins/super-forms/uploads/php/files/vebgcd1cp4db3ijjmdebmtohe2/97929990676.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=empaths+and+anxiety+and+depression
    • 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_off000100ed.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x100ED 16792 bytes
font_01_sfnt_off000118ff.bin
959caaeae3fad3c5fd46ed47de016ab3632afcea3a2175f90806b89faf036ffd
pdf-font-stream PDF embedded font (sfnt) at offset 0x118FF 17044 bytes
font_02_sfnt_off000145a3.bin
a5b3840ba44ea44cbeef49666b3eff677de2dfb71a6be6ca109e7d5e3675afcc
pdf-font-stream PDF embedded font (sfnt) at offset 0x145A3 10808 bytes