Malicious PDF — malware analysis report

Static analysis result for SHA-256 02a7a01723a9b1d8…

MALICIOUS

PDF

100.4 KB Created: 2021-06-29 14:45:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 71b4dd02a463e5d977d3cf338bb9554b SHA-1: 06a35f077715d9027240623da9d0d8ba34364365 SHA-256: 02a7a01723a9b1d85e38936e87796b4f2b662695d9ad536322286a0b852f51df
156 Risk Score

Malware Insights

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

The PDF contains a link farm directing to numerous websites, many hosted on compromised WordPress installations or disposable domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. No scripts were extracted, but the structure and URLs point to a malicious link distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9800

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://bouncebodysupplements.com/newerac2c/userfiles/file/71968625800.pdf In PDF document text
    • https://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c93fcfc0861---42354234854.pdfIn PDF document text
    • http://hydrem.ru/images/file/sebupabilajop.pdfIn PDF document text
    • https://www.bistro-e.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ce407571a7---52329052080.pdfIn PDF document text
    • http://alexanderkanevskyartgallery.com/clientMedia/file/lodisokiwurobubibo.pdfIn PDF document text
    • http://ilyxrace.com/userfiles/files/zomebexifa.pdfIn PDF document text
    • http://www.predoisiasociatii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160749b9862da8---71466463060.pdfIn PDF document text
    • http://cosmic-kino.ru/sadm_files/dawuburezax.pdfIn PDF document text
    • http://www.kidnuri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c7a8f1405c8---wiminakabevo.pdfIn PDF document text
    • http://innotack.com/userfiles/files/rikuxatogotad.pdfIn PDF document text
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bb035532409---2767098009.pdfIn PDF document text
    • http://www.pointcookelectrician.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160cc9d31b224d---debexotefodib.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607b5420588a9---57889863296.pdfIn PDF document text
    • http://multiseal.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/1607d482be5de5---jutuxulazinuwire.pdfIn PDF document text
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/2ab563aa4805e1b611c15312a010cb14/92112995420.pdfIn PDF document text
    • http://aaaexpressac.com/userfiles/file/48820663675.pdfIn PDF document text
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca7348c116---sofapijegibapevataj.pdfIn PDF document text
    • http://pobierzplik.pl/uploads/files/vitavekugil.pdfIn PDF document text
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d6607a83a9---zazapatajok.pdfIn PDF document text
    • https://diversified-nj.com/wp-content/plugins/super-forms/uploads/php/files/8799642f6cb233ac36b1b7e23235204d/18306624241.pdfIn PDF document text
    • http://wccflooring.com/userfiles/files/xetefiv.pdfIn PDF document text
    • https://yuss.it/file/24582019055.pdfIn PDF document text
    • https://tkquiz.com/userfiles/file/73148901230.pdfIn PDF document text
    • https://jfefood.com/wp-content/plugins/super-forms/uploads/php/files/19629e67e8798abc059da12a01b5d312/29734698924.pdfIn PDF document text
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d7f0e14def---54764425403.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=pangolin+size+and+weightPDF link annotation
    • http://e1pl2.nazwa.pl/busy/fotki/file/mosalogem.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_off00012458.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12458 18272 bytes
SHA-256: 7178661f1ac3860032c79c6b063188c4a3ef26eb1c5ce642e143579140b04042
font_01_sfnt_off0001542e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1542E 10576 bytes
SHA-256: 85533d5fc16257f77e870b5ed1f7d87e914d0dbc73484d1ae60a75aa88c6b667
font_02_sfnt_off00016c2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16C2B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1