Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccde9d19fb4e6132…

MALICIOUS

PDF

86.7 KB Created: 2021-09-11 17:55:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: aea01e8554ef3bb9729b30efcc6b577c SHA-1: fbae8ee666c57327e144f49523a16b89f0fe09a8 SHA-256: ccde9d19fb4e613262360f3c90a72cdea713c15fec4ea3fe6e7a60847ece5e7d
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many pointing to disposable domains, indicating a phishing or malware distribution attempt. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically flags the use of disposable hosting for linking to PDFs. The ML classifier and ClamAV detection strongly suggest malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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
  • 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://yousefmaktabi.com/ckfinder/userfiles/files/vevugenipezu.pdf In PDF document text
    • https://asset-books.com/userfiles/file/59076985133.pdfIn PDF document text
    • http://iberia-ex.com/images/blog/file/tiwazukutisotedivimesikej.pdfIn PDF document text
    • https://razredna-nastava.net/files/58495737385.pdfIn PDF document text
    • https://kluchar.net/klucharnet/images/file/rorubaw.pdfIn PDF document text
    • https://budapestpainter.hu/ckfinder/userfiles/files/10695335631.pdfIn PDF document text
    • http://gmtshipping.com/attachment/file/nozemikejajutukigedodowok.pdfIn PDF document text
    • http://areawifi.com/DESARROLLO/userfiles/files/dilaxubodegodana.pdfIn PDF document text
    • https://pu-sk.com/app/templates/js/ckfinder/userfiles/files/42135291895.pdfIn PDF document text
    • https://xn--z4qq44i.xn--kpry57d/upload/actfiles/70696092970.pdfIn PDF document text
    • http://taxplus.in/images/contentimages/files/80794473354.pdfIn PDF document text
    • http://gospelpour100voix.com/fichiers/newsletter/file/56117141719.pdfIn PDF document text
    • https://stockbauer.hu/uploads/file/zenoroxibuziwazajopo.pdfIn PDF document text
    • http://dlevitin.ru/fck_editor_files/files/gavejurogobewala.pdfIn PDF document text
    • http://langeline.com/ckeditor/upload/files/82374007194.pdfIn PDF document text
    • https://philly.drinkpoint.com/uploads/files/7581039750.pdfIn PDF document text
    • https://slotpt2.com/contents/files/bilasir.pdfIn PDF document text
    • http://www.lbtfilm.com/uploads/files/xasuvujaxunolupowime.pdfIn PDF document text
    • http://banglatalkies.com/dynamic-images/cms/file/9072025502.pdfIn PDF document text
    • http://nikacarpet.nikacarpet.com/My_Project/Hamishe_bahar/ahar_img/files/vojafiregevepam.pdfIn PDF document text
    • https://event-connections.net/wp-content/plugins/formcraft/file-upload/server/content/files/1613a9dd68f724---27705879109.pdfIn PDF document text
    • http://elijasprojekts.lv/files/file/45401930909.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=best+free+video+editing+software+for+android+without+watermarkPDF 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_off0000ecfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECFC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010513.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10513 11152 bytes
SHA-256: 94a50507ce7cee14d6f5ae3790b07a2c890b8968c816d5a38513948ab463f820
font_02_sfnt_off00011ed1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11ED1 17756 bytes
SHA-256: b2e7e00e44ad61ede3614d944f71398fd62d6c393a8caa429a658060e4ab1076

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