Malicious PDF — malware analysis report

Static analysis result for SHA-256 0af95f987c571a49…

MALICIOUS

PDF

98.9 KB Created: 2021-09-04 03:53:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 17a0ce021ba6ecc3d209dbf437ae7096 SHA-1: 0a4f2ab4fd7457a60289cd274add088eb7a2bc07 SHA-256: 0af95f987c571a496852dd1d3148c1184f17649697d3a038a240c800b09fc4ef
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a large number of external links, many pointing to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://blpest.com/UserFiles/file/dirimuf.pdf In PDF document text
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a632cb8ee50---41680036915.pdfIn PDF document text
    • http://benthanhsgfarm.net/images/uploads/files/fogenev.pdfIn PDF document text
    • http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9f5e01c79f---72242765738.pdfIn PDF document text
    • http://miass.realxenon.ru/uploads/files/56771976545.pdfIn PDF document text
    • http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c65f11a2f6---pegowojag.pdfIn PDF document text
    • https://hightechrustremovers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1612bbb07ae5d0---79747823930.pdfIn PDF document text
    • http://sattamatkapatti.com/userfiles/file/58646332898.pdfIn PDF document text
    • http://ural-resyrs.ru/data/file/raduw.pdfIn PDF document text
    • http://keralajesuits.org/userfiles/file/46490900030.pdfIn PDF document text
    • http://xn--80affcyoc0ac1f6a.xn--p1ai/admin/modules/ckeditor/ckfinder/userfiles/files/makitekujaz.pdfIn PDF document text
    • http://roland-toys.eu/userfiles/file/18511848285.pdfIn PDF document text
    • http://www.cuadernos.in/wp-content/plugins/formcraft/file-upload/server/content/files/160b1aa3b32b41---xadajesojeve.pdfIn PDF document text
    • http://standartbio.com/fckfiles/file/62700099970.pdfIn PDF document text
    • http://www.uvhk.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e9d652fe8c---motaxob.pdfIn PDF document text
    • http://sciattella.net/images/file/62629490408.pdfIn PDF document text
    • http://yossy.biz/userfiles/file/lupitagokusamofej.pdfIn PDF document text
    • https://braindevelopmentmaps.org/userfiles/files/27102817356.pdfIn PDF document text
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/160cdc3f8e1381---pexowozijodiku.pdfIn PDF document text
    • https://www.sudburyhighspeedinternet.ca/wp-content/plugins/super-forms/uploads/php/files/6142ed0a8c130ee38d965894d5dddac9/95842808486.pdfIn PDF document text
    • https://myhoorayhealth.com/wp-content/plugins/super-forms/uploads/php/files/eebc0355c6e116a99dee35ab9841306c/mebolaforewabozanonokujaw.pdfIn PDF document text
    • http://musclecar-taps.com/js/upload/files/36120667223.pdfIn PDF document text
    • http://polipack.ru/content/file/3835678520.pdfIn PDF document text
    • https://yziact.fr/wp-content/plugins/super-forms/uploads/php/files/9fd1ajrd06ng76trmp0t1l5end/sasolejopav.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=plan+de+afaceri+hotel+pdfPDF 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_off00011902.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11902 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00013114.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13114 20376 bytes
SHA-256: 26c59d3df2cf1265616ab9052e41aea058111c0579491b5074b1498f697a10d3
font_02_sfnt_off000165f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x165F2 10552 bytes
SHA-256: 3391d3290e38723a315c1996be915ac6e6c7a1ae7e7e3abb998756a3a9f604c3

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