Malicious PDF — malware analysis report

Static analysis result for SHA-256 f60df6f294e0d12f…

MALICIOUS

PDF

71.1 KB Created: 2021-09-05 00:00:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 383cc8aa554d4a5aae903814c4df1268 SHA-1: 26a5e2444c47d236fec456c7350bca0a986e3f60 SHA-256: f60df6f294e0d12f6523deb4424352cc3b66351c91cf20a8f9c5f9c408531c60
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains numerous embedded URLs, many of which point to compromised CMS upload directories or disposable hosting, indicating a link farm. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or distributing further malware. The primary function appears to be redirecting users through a network of potentially malicious or SEO-abused websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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
  • 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 http://mawaevents.com/uploads/file/98689091142.pdf In PDF document text
    • http://lblussana.it/images/file/welotajiriwenasopiwabab.pdfIn PDF document text
    • https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16078ed575a62e---74236626382.pdfIn PDF document text
    • https://nowackleverkusen.de/wp-content/plugins/formcraft/file-upload/server/content/files/16072d183e54c0---92933644865.pdfIn PDF document text
    • https://p99.tw/pro_pic/files/fuwixiponoduresura.pdfIn PDF document text
    • http://libertyquad72.fr/userfiles/file/biparokusunipagevojerer.pdfIn PDF document text
    • https://baconbites.com/wp-content/plugins/super-forms/uploads/php/files/gnug00jah6mvpmegkpqgkmjso1/46680295197.pdfIn PDF document text
    • http://civicwomen.com/ckfiles/files/17864697896.pdfIn PDF document text
    • http://dinskayarealty.ru/media/file/18540696876.pdfIn PDF document text
    • http://travelbilet.ru/sites/default/files/file/8001279641.pdfIn PDF document text
    • https://almoheetmanpower.com/public_html/userfiles/file/devaburiwuweruri.pdfIn PDF document text
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf881c36d0a---mexekipateba.pdfIn PDF document text
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608570b2ada5c---92712700116.pdfIn PDF document text
    • https://chiataiec.com/userfiles/Proj_Name/files/nixeg.pdfIn PDF document text
    • http://merrygoldholidays.com/ckfinder/userfiles/files/jozomowefipovi.pdfIn PDF document text
    • http://ekotronic.eu/files/file/38453981632.pdfIn PDF document text
    • https://thediamangroup.com/_images/files/xurexolurotosetujixevojos.pdfIn PDF document text
    • http://oreade-breche.fr/userfiles/file/nopef.pdfIn PDF document text
    • http://aotwresort.org/ckfinder/userfiles/files/vufakowavum.pdfIn PDF document text
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607b32e609d5b---dumofubuvaxakufepuribuzes.pdfIn PDF document text
    • https://cremeconferences.com/wp-content/plugins/super-forms/uploads/php/files/30a1e0028b87a0e0c549c836997fa6e3/20386618296.pdfIn PDF document text
    • https://alphaveneers.co.uk/wp-content/plugins/super-forms/uploads/php/files/47aee2eb9f096ef88fb96fd66e504218/24408282914.pdfIn PDF document text
    • http://traktorpulling.de/ablage/userfiles/files/jolid.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=swimming+training+pdfPDF link annotation
    • http://perfecturology.cafe24.com/upload/editor/imagefile/fiwadodupojibobibo.pdfIn 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://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_off0000b6bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB6BF 10536 bytes
SHA-256: d53161bc9ef073725298e79f58181fe3b0f4cb5f474b8542309ba576dbd6fc56
font_01_sfnt_off0000ce8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE8B 15816 bytes
SHA-256: c9971d64e9447456eff67c9644861799e78ecddc229943f296f2196475113b51
font_02_sfnt_off0000f725.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF725 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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