Malicious PDF — malware analysis report

Static analysis result for SHA-256 fad0e9600bbebdaf…

MALICIOUS

PDF

74.6 KB Created: 2021-09-10 06:11:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: cfc6fc5baa77da944d79dbb203c9bf7e SHA-1: fb4bb82309536a1064decb1af40b9914228907dc SHA-256: fad0e9600bbebdafb921036ec9c8358b56842cdbe15ac0792173bb34f3a5e7c8
126 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, with heuristics indicating it functions as a link farm. The embedded URLs, such as http://ncfc.com.tr/ckfinder/userfiles/files/88727804486.pdf, likely lead to phishing sites or further malware downloads. The document body is heavily obfuscated, preventing analysis of its specific content, but the overall structure points to a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 5

  • 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.
  • 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://ncfc.com.tr/ckfinder/userfiles/files/88727804486.pdf In PDF document text
    • https://talaa-obour.com/webmisr/uploadwebmisr/file/kuduzax.pdfIn PDF document text
    • http://demo-enriquemora.shopcloud.es/ckfinder/userfiles/files/94068670324.pdfIn PDF document text
    • http://octapus.vn/images/uploads/files/84618833742.pdfIn PDF document text
    • http://bantinnhadat.com/users/files/15611821675.pdfIn PDF document text
    • https://www.fangjin.org/ckfinder/userfiles/files/6952474684.pdfIn PDF document text
    • https://sv-fin.ru/wp-content/plugins/super-forms/uploads/php/files/89eeffbd8e2dd90de33af812a9847cc5/79585957130.pdfIn PDF document text
    • https://matharu.ae/userfiles/file/85076527248.pdfIn PDF document text
    • https://gloriamus.org/Uploads/userfiles/files/5788776751.pdfIn PDF document text
    • http://lj-group.cn/upload/files/ragalugusegeweje.pdfIn PDF document text
    • https://www.hdontheroadnapoli.it/wp-content/plugins/formcraft/file-upload/server/content/files/161393fafb4f00---69786931912.pdfIn PDF document text
    • http://petswithlove.com/cvsprojects/SSK/Source/2.0.0/images/files/4375002259.pdfIn PDF document text
    • http://max-metal.pl/gfx/file/8475153375.pdfIn PDF document text
    • http://derkwoo.com/upload/editor/files/10175574296.pdfIn PDF document text
    • http://saktigroup.in/uploads/68119918733.pdfIn PDF document text
    • http://bangiyaparishadtoronto.ca/bpt/editor/uploadfiles/berokusobivef.pdfIn PDF document text
    • https://agape4u.org/userfiles/file/27027343471.pdfIn PDF document text
    • https://pjkconstruction.ca/images/file/67132044420.pdfIn PDF document text
    • http://preiss.at/upload_files/files/sanonuzoxitobe.pdfIn PDF document text
    • http://kelvista.lt/images/files/50695072282.pdfIn PDF document text
    • http://vzwsportenmuziek.com/content_docs/remaronutuginazagopomuzi.pdfIn PDF document text
    • https://www.pharmawell.eu/ckfinder/userfiles/files/39036681504.pdfIn PDF document text
    • http://actinq.nl/upload/file/bepaxenuwujonapijev.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=stock+android+widgetsPDF 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_off0000c08d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC08D 17372 bytes
SHA-256: c1211338aa9ffec41f327d13030915ab385185fc16040f6227070fa1d6afb8b1
font_01_sfnt_off0000edc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDC2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000105d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105D9 10752 bytes
SHA-256: 5f506c49c732b43c8721689ea47fe4488af89726b81a2fe088db94af0c79c615