Malicious PDF — malware analysis report

Static analysis result for SHA-256 aab9aa5a78db7bf7…

MALICIOUS

PDF

81.9 KB Created: 2021-06-10 21:15:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 87ac257922b30a4b6e984596793f51ba SHA-1: 6e5cf861057ac599bc5beb146ebdb17cf61236a9 SHA-256: aab9aa5a78db7bf7ca3be535758c31df4c8dc9ad52e7150ded9654d72ed45107
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document acts as a lure, instructing the user to download a password-protected archive, likely to bypass security scanning. It contains numerous links to external sites, many of which host further PDF files, suggesting a link farm or download distribution mechanism. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • 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://coretry.ru/uplcv?utm_term=how+to+hack+aj+accounts+2020 PDF link annotation
    • https://www.sehersirin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc7ab8150a---piwekuvosuwawakujarak.pdfIn PDF document text
    • http://thaimassagemodel.com/ckfinder/userfiles/files/dikete.pdfIn PDF document text
    • https://www.mixedclass.com.au/wp-content/plugins/super-forms/uploads/php/files/nlk4pb3916po8cjh4q80b4cc63/sukovazodawevekujogexu.pdfIn PDF document text
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/8a2c23bff4b8fe8d98ec79f2fd627bb5/juxixugejibusezujesudoz.pdfIn PDF document text
    • http://bergfin.se/wp-content/plugins/formcraft/file-upload/server/content/files/160b8a17ef3271---70343037218.pdfIn PDF document text
    • https://gpuhub.net/wp-content/plugins/super-forms/uploads/php/files/l2837jse43sr87li630qikdd2t/gusunumoxirurilixifili.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b3ba45a802---88344349516.pdfIn PDF document text
    • https://schmitz.cz/res/file/webuk.pdfIn PDF document text
    • https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/fgjgpgm6n75q8ua4vo1pf7kub8/dulufofipononalu.pdfIn PDF document text
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b734ecb29ae---jabafewoturitutusekobekaf.pdfIn PDF document text
    • http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160818f0824fcc---reladigasima.pdfIn PDF document text
    • https://luyenthitoeic.info/userfiles/file/kesapizarefetamej.pdfIn PDF document text
    • http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/dvellh678r4b3urgeunm4pgqs7/17581963379.pdfIn PDF document text
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160809227c8b55---99962767026.pdfIn PDF document text
    • https://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/96e426b3d19b91760e47776a9239439b/radonuvusinogov.pdfIn PDF document text
    • http://banlinhkienlaptop.com/userfiles/file/30521890909.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/984769666cef221cfdc989602b2b6d52/43894309712.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e9a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9A6 5224 bytes
SHA-256: e252badb8922a845d71daa2c1a14f1784416acd8299dc84acbfe849dc0bd5ab5
font_01_sfnt_off0000fb81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB81 11732 bytes
SHA-256: 044b2820ad0095e15033ca3c8129a84d7da83112cb1241c8dfa3b540c2a9b536
font_02_sfnt_off00012395.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12395 16184 bytes
SHA-256: f0dab19486809e516fe56850b7b046ffaa305fd205921d59208d887e813e51d9

Open this report in the interactive analyzer, or submit your own file for analysis.