Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8ba98ed46eca4f4…

MALICIOUS

PDF

96.8 KB Created: 2021-06-28 03:21:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 49af6ad0bcbddec04e8316809fd21bd7 SHA-1: 7622abad6bc4e52c9afad01bcfc4522be07fe5fa SHA-256: d8ba98ed46eca4f41f7c36c21d93e915aeaf96f869c9fa725407a658fd2c8688
156 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as a phishing trojan and a machine learning classifier indicated a high probability of maliciousness. Heuristics indicate the document functions as a link farm, directing users to multiple compromised WordPress sites and disposable hosting domains. The embedded URLs likely lead to further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://laborke.ru/uplcv?utm_term=wheat+flour+and+jaggery+cake PDF link annotation
    • https://almoheetmanpower.com/public_html/userfiles/file/56844931167.pdfIn PDF document text
    • https://jamiatulbanat.in/wp-content/plugins/formcraft/file-upload/server/content/files/160a557fd638be---wegovubukuramufit.pdfIn PDF document text
    • http://www.tecnotrefg.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608b6c780d1d1---11111788516.pdfIn PDF document text
    • https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/a3aee611747c530c8a370c43aa6f3b64/56318811811.pdfIn PDF document text
    • http://www.uppld.org/wp-content/plugins/formcraft/file-upload/server/content/files/160741d7da1ca3---neroxaxusaxuvox.pdfIn PDF document text
    • https://thinkglobalcompliance.com/ckfinder/userfiles/files/kilobebeparimobulunod.pdfIn PDF document text
    • https://tsegypt.com/file/81086474246.pdfIn PDF document text
    • http://patrick-jardinage.fr/ckfinder/userfiles/files/97041991404.pdfIn PDF document text
    • http://jar-ted.pl/file/91428393784.pdfIn PDF document text
    • http://duszek-lasu.pl/userfiles/file/nunifutupuwasopit.pdfIn PDF document text
    • http://thehawthornnyc.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087b138af2f5---wowetejolina.pdfIn PDF document text
    • http://ptairsupply.com/userfiles/file/35890691980.pdfIn PDF document text
    • http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160789e359e484---16154296466.pdfIn PDF document text
    • https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/16084b6e44c86a---40144889524.pdfIn PDF document text
    • http://redfordunion70.com/clients/869360/File/ralinomefajotifikikuxaba.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/12696400653.pdfIn PDF document text
    • http://usaoxin.com/userfiles/2021-6/file/4637542855.pdfIn PDF document text
    • https://spbmworld.com/anaeter_capital/siteadmin/userfiles/files/63181248382.pdfIn PDF document text
    • https://dimensioninteractive.com/WYSIWYGImage/file/labupapebumekolofemid.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f299.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF299 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010aab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AAB 18880 bytes
SHA-256: 26ef456e50fe5c7286949bc0d2d14c44f806ed2dbb7e02660c531305bf6820f7
font_02_sfnt_off00013baf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13BAF 16796 bytes
SHA-256: a6b32969a91ebd3b45c69969b3599670cd4d35dbd9380f8aa9a7870cf4cd370c
font_03_sfnt_off000153c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x153C5 10924 bytes
SHA-256: 0fa0fb0d0f55bb7c12f81beb70fb5ea84a9d968bf6d7fcefafb2e8aeb05ad703
font_04_sfnt_off00016ce2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16CE2 1824 bytes
SHA-256: 065c7a4f11f9e75f6e8b37807bc82b370f7b2846456f0b3b832c619392bb01b8

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