Malicious PDF — malware analysis report

Static analysis result for SHA-256 69776faa11c324ad…

MALICIOUS

PDF

88.4 KB Created: 2021-09-17 05:22:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: e98a6a3f1915217d8ada59a3e23a8a51 SHA-1: 551c6c2c5a618ce03e09f4a9c31617ef995206f9 SHA-256: 69776faa11c324adeb104d36ca9d2d1ac8858fde4266f72dcc3ce9d7e38b16bc
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. The presence of embedded JavaScript and numerous external links, many hosted on compromised or disposable domains, suggests a phishing or malware distribution attempt. The document body is heavily obfuscated, preventing a clear understanding of its specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://tivatijapan.com/uploads/userfiles/file/81903454091.pdf In PDF document text
    • http://www.thebetterinsurance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613154dd9372f---janilogodaxapiguvam.pdfIn PDF document text
    • https://asaptransfers.co.uk/wp-content/plugins/super-forms/uploads/php/files/9eca30ab49b4f88afdd57665593d3195/pitezowipelo.pdfIn PDF document text
    • https://hanomanberjaya.com/contents/files/51192691816.pdfIn PDF document text
    • http://www.ondebiz.com/userfiles/file/23465811782.pdfIn PDF document text
    • http://oletrans.sk/editor_uploads/files/92077989496.pdfIn PDF document text
    • http://mineraux-et-lithotherapie.fr/ckeditor/upload/files/23075731028.pdfIn PDF document text
    • http://dansecyr.ca/pdf/file/54863110453.pdfIn PDF document text
    • http://ventiliatoriai.lt/js/ckfinder/userfiles/files/mamifuba.pdfIn PDF document text
    • https://optimumquestsolutions.com/ckfinder/userfiles/files/15750589807.pdfIn PDF document text
    • http://mofrantech.com/userfiles/file/43226991688.pdfIn PDF document text
    • http://metisentry.net/ckfinder/userfiles/files/63821895960.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/hr80k5pht61a636qbk84401fgs/japamiberagibadubor.pdfIn PDF document text
    • http://ttccid.com/userfiles/file/34066966783.pdfIn PDF document text
    • https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e24f859510---7441845534.pdfIn PDF document text
    • http://sinorarechem.com/upload/files/51884215664.pdfIn PDF document text
    • http://blekinge.boj.se/uploads/userfiles/files/27151618576.pdfIn PDF document text
    • http://vina2002.com/uploads/files/56254812358.pdfIn PDF document text
    • http://pantanalmsnews.com.br/ckfinder/userfiles/files/41426236420.pdfIn PDF document text
    • https://rubin2000-distribuitorshop.ro/userfiles/file/safasiruvaxotunipom.pdfIn PDF document text
    • https://vakukh.ru/wp-content/plugins/super-forms/uploads/php/files/3b228801149b27fb5a3b3964526d6fc3/segososopetepelapikufe.pdfIn PDF document text
    • http://www.mecateengenharia.com.br/ckfinder/userfiles/files/15646670988.pdfIn PDF document text
    • http://theheavent.com/userfiles/files/lixokugufitesisan.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=harry+potter+and+the+deathly+hallows+part+2+script+pdfPDF link annotation
    • 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://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_off0000f247.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF247 18148 bytes
SHA-256: 796baf5a5f4932853d3cf4b2bd9939565d3ca60651ebcc0e9bf4ca8c11c42b7a
font_01_sfnt_off00012160.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12160 11028 bytes
SHA-256: a47e1761c1d17f1e6bbff30db444ebf7ec1ac6024ea81e440b49a0d65d78a5a4
font_02_sfnt_off00013b10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B10 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1