Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ee777921996d7ff…

MALICIOUS

PDF

80.7 KB Created: 2021-09-03 00:57:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 8e57afc6069a02fbee92bc9ad31afc91 SHA-1: 49a4cd29630edbe50e2de6480a9c7a2e07c14089 SHA-256: 0ee777921996d7ffe62bc2d4ed9b85e82f7f910988342a87dac123b18f19c047
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which are hosted on disposable domains or compromised WordPress sites, indicating a link farm designed to redirect users. The presence of a 'utm_term' parameter suggests a tracking mechanism for phishing campaigns. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://inwebjor.ru/uplcv?utm_term=ielts+reading+test+pdf+file PDF link annotation
    • https://shop-ecobati.com/medias/upload/files/kiniwolajesazugilowuvom.pdfIn PDF document text
    • http://clarkhigh72.com/clients/3/34/34275c7d49a174b5f6cf03bf5966da6c/File/vufiwugiritogakozijov.pdfIn PDF document text
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e416916f894---51155572375.pdfIn PDF document text
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cf021745a16---56766613921.pdfIn PDF document text
    • https://digireg.gr/upload/41126860693.pdfIn PDF document text
    • http://boracayg.com/FileData/ckfinder/files/20210807_8B9C5CE158EE90B0.pdfIn PDF document text
    • http://qianlong99.org/ckfinder/userfiles/files/1551923036.pdfIn PDF document text
    • http://xn--72c7caerxx0d3a9eve.com/UserFiles/File/gepisapateje.pdfIn PDF document text
    • http://csc-021.com/userfiles/file/20210728162135_xa20ld.pdfIn PDF document text
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093fb9e51799---96106485876.pdfIn PDF document text
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608cf142f2875---dapixironinovisofer.pdfIn PDF document text
    • http://china-engine.net/ckfinder/userfiles/files/73486037070.pdfIn PDF document text
    • https://too.kg/wp-content/plugins/super-forms/uploads/php/files/b6fdbb7a1a4afe9024e3430efd3b3f2b/jasaxag.pdfIn PDF document text
    • https://rmissio.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160c43f83554a2---94193434688.pdfIn PDF document text
    • http://4rrecycle.com/files/file/foxam.pdfIn PDF document text
    • http://portamarioarchitetto.eu/userfiles/files/50436336377.pdfIn PDF document text
    • http://allegroescrow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073c9ebb493b---gumojemepipoj.pdfIn PDF document text
    • http://kirsanov-maslo.ru/uploads/fesosilis.pdfIn PDF document text
    • https://svltv.in/userfiles/files/51609783191.pdfIn PDF document text
    • https://wurstfargo.com/wp-content/plugins/super-forms/uploads/php/files/56fd1ccd84560da5769282a136dcad39/govivizavixufejakof.pdfIn PDF document text
    • http://villaturri.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a8407e05456---xavepufe.pdfIn PDF document text
    • https://dtcprojects.com.au/wp-content/plugins/super-forms/uploads/php/files/t1d31io7lmcg9hr18385psddpk/dumegexivutoredijawidopa.pdfIn PDF document text
    • http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abead4ccaf4---15105340031.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_off0000d8c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8C5 10504 bytes
SHA-256: c7375376dda930e6801c0b3174f78fd4185ead937bb67fb6146d6247e570989f
font_01_sfnt_off0000f08a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF08A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001089c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1089C 17284 bytes
SHA-256: bdb0ce7d2a00dc3d292a737d60b8ee8adfc681911c505bba3dc3b2b786ddc4b3

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