Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2a062861060a7d4…

MALICIOUS

PDF

85.7 KB Created: 2021-09-07 05:48:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: ce8fc281a7b2095e415aa82671b23025 SHA-1: 6fb96ac7dbc8a66cd25a05d0fc2bb0a3a3a8b2c4 SHA-256: c2a062861060a7d496951f4202c7d57cd80b43610bdc30c5de63d0f0d3ebc7f6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://irlanc.ru/uplcv?utm_term=deforestacion+en+chile+pdf PDF link annotation
    • http://np-laser.com/upload_fck/file/2021-7-3/20210703182101719163.pdfIn PDF document text
    • https://iva-vietnam.com/userfiles/file/kuvani.pdfIn PDF document text
    • http://agnieszkapawlik.com/userfiles/file/74659353715.pdfIn PDF document text
    • http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/b2d904e6a788308a26510ebb63e5ade7/ronomomigilimaluxive.pdfIn PDF document text
    • http://diplomat2014.ru/ckfinder/userfiles/files/93684113277.pdfIn PDF document text
    • http://fygl.net/uploads/file/30090447304.pdfIn PDF document text
    • http://sobsai.com/ckfinder/userfiles/files/barerovefusipuvitidal.pdfIn PDF document text
    • http://anhuifan.com/upload_fck/file/2021-6-18/20210618002217211308.pdfIn PDF document text
    • https://nyirfa.hu/uploads/files/pexubowufuxutoji.pdfIn PDF document text
    • http://mrbossamktown.com/uploads/files/zajuwirivekazudiwed.pdfIn PDF document text
    • http://bmhs1964.com/clients/a/ae/ae3b7fe25fc1fd458a9bccd7578bee9c/File/74122509061.pdfIn PDF document text
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087f145ef00a---28209868621.pdfIn PDF document text
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c9e90474d05---jopesipezadeboloraduv.pdfIn PDF document text
    • http://www.aadhar-interior.com/userfiles/file/20594100593.pdfIn PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160adde34e94d5---wumasokadaloxagesusovi.pdfIn PDF document text
    • http://attep.com/home/sandbox/domains/heekee.com.hk/public_html/ckfinder/userfiles/files/1774859574.pdfIn PDF document text
    • http://gpp300.fr/userfiles/file/lisapikamagujubor.pdfIn PDF document text
    • https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092746f438b0---43574951994.pdfIn PDF document text
    • https://www.saltriot.com/wp-content/plugins/super-forms/uploads/php/files/c60bd7557fa95b72c5f0b89c1c92d839/53027653956.pdfIn PDF document text
    • https://www.opdrrustukalac.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bab09e7d171---9607178112.pdfIn PDF document text
    • https://pluviaterra.mx/wp-content/plugins/super-forms/uploads/php/files/e347543afe87b940f1a8aeaa2ee7ed37/61413820746.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/cb099621c3d8e86442d37f9494438ec4/mobubupozutezipejiwi.pdfIn PDF document text
    • http://apogeeconsultancy.com/upload/files/dumifoxef.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_off0000e29f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE29F 21352 bytes
SHA-256: 13b49848f123cf4f76c4c2d96fc21f8c1390b63ba27aae9c0471cf43668eadfc
font_01_sfnt_off00011845.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11845 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001305c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1305C 10716 bytes
SHA-256: 27c62f252ffdb57d5c37dc2e34e59b9f69efb1855a8bd68de34a56b206d63955

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