Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e2e87eb73f1470e…

MALICIOUS

PDF

73.6 KB Created: 2021-08-28 04:46:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 85fb956b66f72003e7ab39955c0c00a7 SHA-1: 41d03e709c4a9423ec1f1bf8463127210d5ff52d SHA-256: 2e2e87eb73f1470ef29f140c4f1bde51bc2ee6493c29f747baf409845e5cd4fd
156 Risk Score

Malware Insights

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

The PDF contains numerous external URIs and links to compromised CMS upload storage, indicating it functions as a link farm. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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 https://drafthe.ru/uplcv?utm_term=adjectives+with+u+to+describe+a+person PDF link annotation
    • http://lushexperiences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160902f5ec7305---niriduwaxewopozalurig.pdfIn PDF document text
    • http://corporatiegids.nl/uploads/files/28295094173.pdfIn PDF document text
    • https://stcatherine.ac.ug/wp-content/plugins/formcraft/file-upload/server/content/files/160824af2dd5c2---1853600818.pdfIn PDF document text
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/160927ecde01cd---disejodogepuginogexuf.pdfIn PDF document text
    • https://www.lire-les-notes.com/ckfinder/userfiles/files/57813944503.pdfIn PDF document text
    • http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160802da307616---7697188727.pdfIn PDF document text
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c6bc93091c5---64028825779.pdfIn PDF document text
    • http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160800e92e476f---nojavakogokavodugiret.pdfIn PDF document text
    • https://morganmethod.com/ci/userfiles/files/begafawa.pdfIn PDF document text
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608b8264dea65---42500867966.pdfIn PDF document text
    • http://peggylittlelawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/67162409765.pdfIn PDF document text
    • https://www.seblocation.com/ckfinder/userfiles/files/81996554256.pdfIn PDF document text
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607ec471a5be0---fofipad.pdfIn PDF document text
    • https://vizzzio.ru/wp-content/plugins/super-forms/uploads/php/files/168f02e41cfb7538722a26f48d6ad74f/27716558903.pdfIn PDF document text
    • https://remoteworkerclub.com/wp-content/plugins/super-forms/uploads/php/files/096c593ec377ab7d4da55c464e99ee9f/beribidejar.pdfIn PDF document text
    • http://www.christinemartin.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16098beb08821a---61346426084.pdfIn PDF document text
    • https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b59a4b28f5---rumow.pdfIn PDF document text
    • http://agcslohian.com/userfiles/file/vejexu.pdfIn PDF document text
    • https://hcs1000.org/wp-content/plugins/super-forms/uploads/php/files/57e619ecc7dbceddfe6b87e033d66a62/36858177805.pdfIn PDF document text
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/160711ad960722---56135597894.pdfIn PDF document text
    • http://entone.es/wp-content/plugins/super-forms/uploads/php/files/3c1ee1ca45fce15e7062952505442366/fidikutejufomenenaminasi.pdfIn PDF document text
    • http://endustriyelkiralama.com/wp-content/plugins/super-forms/uploads/php/files/ueasoob4te3d1mc4uvan49ao1j/tajimipujuxomuxadi.pdfIn PDF document text
    • https://sunwayhk.com/louis/STARKGROUP/ckfinder/userfiles/files/40785194314.pdfIn PDF document text
    • http://zulassung4you.de/bilder/file/matazufojatikemufalebulof.pdfIn PDF document text
    • https://minegociomiweb.com/userfiles/file/pugizuruvegibasulubisigo.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_off0000bf94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF94 11068 bytes
SHA-256: b86a23699b6e846f1b19270d646be293a570b4264a09e0a94890848568689cf1
font_01_sfnt_off0000d923.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD923 15404 bytes
SHA-256: 3d25f24c37bad099363d7821a24e45f1f29cb6209f53a4ce645b99e56a6a7942
font_02_sfnt_off00010031.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10031 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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