Malicious PDF — malware analysis report

Static analysis result for SHA-256 af4cc6418bf07c3d…

MALICIOUS

PDF

88.1 KB Created: 2021-07-26 13:54:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: a87607d3e6130c1d49d886514721ad95 SHA-1: 5696f0a84bbd9f482adc2966dbc8a84e40579174 SHA-256: af4cc6418bf07c3d63a273a7dd044df46a9c14103fa17aa7142ae518b48896ca
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised WordPress installations or disposable domains, indicating a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards an attack pattern involving redirecting users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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://elementsgogreen.com/userfiles/file/jakikosesumabemiwufit.pdf In PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606f936c8f77a---73522565361.pdfIn PDF document text
    • https://golf-tout-terrain.com/publish/page/file/38269533958.pdfIn PDF document text
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160987ffaa705b---22020439529.pdfIn PDF document text
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cdde45916e6---dutodesife.pdfIn PDF document text
    • http://www.dnevi-sekretarjev.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1608c0a6f14ed4---bunexedobetotide.pdfIn PDF document text
    • https://too.kg/wp-content/plugins/super-forms/uploads/php/files/96896223cf50c8184a6eb262fbf6e1b7/ferogi.pdfIn PDF document text
    • https://gccpay.net/wp-content/plugins/super-forms/uploads/php/files/c4c9fbf9dedce699b529c26f6a3ee3e0/lalakarefezetukanom.pdfIn PDF document text
    • https://drivetripper.com/userfiles2020/files/88816535950.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/dgu6jvtov3d994h30sq8pmf0kt/64980627221.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/34b165i7r8esne8gdcmhd289q6/71044570480.pdfIn PDF document text
    • http://kayamedbursa.com/userfiles/file/72510527573.pdfIn PDF document text
    • http://alnoorcity.com/userfiles/file/rumanowazonixiper.pdfIn PDF document text
    • http://ekopaczka.pl/imgbrama/files/jidetexawufasup.pdfIn PDF document text
    • https://preprodpcb.com/userfiles/files/91392336578.pdfIn PDF document text
    • http://www.thebetterinsurance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a46f840ec79---nulavawopawolif.pdfIn PDF document text
    • https://evg-prague.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160b4703b486f5---90305973939.pdfIn PDF document text
    • https://metricgroup.it/uploads/file/tobemeboninikax.pdfIn PDF document text
    • http://driver-jazda.pl/upload/file/2463354184.pdfIn PDF document text
    • https://fresh-cherries.com/ckfinder/userfiles/files/4452863202.pdfIn PDF document text
    • http://kargiskola.ge/myadmin/ckeditor/ckfinder/userfiles/files/fuken.pdfIn PDF document text
    • https://tl-systems.hu/files/files/49559193855.pdfIn PDF document text
    • http://yuanyoujie.vip/userfiles/file/nifulijuxepeka.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=ate%C5%9F+ve+su+2+kitap+indirPDF 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_off0000f04f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF04F 19232 bytes
SHA-256: 59c3c0de3b49b48869a6121e08fef09e64529624a213d9ffa7792ffa554e142a
font_01_sfnt_off00011f34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F34 10820 bytes
SHA-256: 76bdc17bf0f9ba89befe6df32a77d637b3f5e39c75d778632265ad7b3ae9f8e2
font_02_sfnt_off000137f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137F5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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