Malicious PDF — malware analysis report

Static analysis result for SHA-256 80a7268de0176445…

MALICIOUS

PDF

85.3 KB Created: 2021-09-16 18:20:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 91ec837a0a19ed8a071534b6d3df808e SHA-1: b248c5c56f50ba4e0a56bb92940cbb5077f3ffe7 SHA-256: 80a7268de0176445a0aa3b9d27acc84a22db36bf5b94bf43e6cdf5a6fc7e71e6
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a link farm pointing to multiple disposable domains, suggesting an attempt to redirect users to malicious content. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicates a common tactic to bypass gateway scanning by instructing users to decrypt a payload. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9860

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://geasit.it/userfiles/files/83468183976.pdf
    • http://changrung.com/ckfinder/userfiles/files/26714210826.pdf
    • http://we2meeting.com/ckfinder/userfiles/publics/files/nizaziretifedojoto.pdf
    • https://nepalonlineexam.tisaracademy.com/userfiles/files/vasujawanepumusiwalexuz.pdf
    • http://timandlor.com/userfiles/file/divaxateri.pdf
    • https://vashadvokat82.ru/wp-content/plugins/super-forms/uploads/php/files/4c7baad9b022d433c4aadea4412e25c8/fabisafuxaterirake.pdf
    • http://salamatekhanevadeh.ir/ckeditor/files/files/64954084921.pdf
    • http://48bulls.com/js/upload/files/bujovubitanizudexefufute.pdf
    • https://netwindowvn.com/uploads/userfiles/file/4216204187.pdf
    • http://pomocnaukowa.net/Upload/file/10462004744.pdf
    • http://salon-urody-bellis.pl/images/file/30716128037.pdf
    • http://stlukesfp.org/ckfinder/userfiles/files/xixobifitarex.pdf
    • https://hopefor.today/wp-content/plugins/super-forms/uploads/php/files/8cbf80ead6c652d3fa31b94dc5c82f5d/90091189724.pdf
    • http://nature-revive.org/files/file/jivepujuzagav.pdf
    • http://novaserv.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140ce6721238---volugozuwotuxupiruwakixi.pdf
    • https://markzone.az/wp-content/plugins/super-forms/uploads/php/files/b1n9vq0g4066s0vt8tj93g0i7u/57319607536.pdf
    • http://hasyo.net/files/file/69882840598.pdf
    • http://archive-2014.humandoc.pl/attachments/file/lufogejekake.pdf
    • http://verynailscm.com/user_img/file/gitoraroriniroxugogajut.pdf
    • http://paletydozahrady.cz/ckfinder/userfiles/files/90575123208.pdf
    • http://exosushi.com/uploads/files/xunuj.pdf
    • https://abouelhoulgroup.com/userfiles/files/57876251929.pdf
    • http://alessandrobelleseveterinario.eu/userfiles/files/1341177817.pdf
    • http://foto-preiss.at/upload_files/files/kodowuvudaxiziduzi.pdf
    • http://serextion2006.com/js/upload/files/93777792583.pdf
    • http://kientrucphatloc.com/upload/files/54078132432.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=room+planner+home+interior+mod+apk
    • 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_off0000ea15.bin
6e800853df30affe2337d092f616e3b6082c53e53279fd9464506a62352859a8
pdf-font-stream PDF embedded font (sfnt) at offset 0xEA15 10628 bytes
font_01_sfnt_off00010220.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10220 16792 bytes
font_02_sfnt_off00011a32.bin
1c11adee6e4cdafb7314c83ac31080893d5d727bffbb1759f5895867058cb5b4
pdf-font-stream PDF embedded font (sfnt) at offset 0x11A32 17912 bytes