Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5f52d96bc483e0d…

MALICIOUS

PDF

116.9 KB Created: 2021-06-13 09:13:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 8a89668464a18001ec213070948916d3 SHA-1: 3791d7a44f695bedaa62948f2add9bc55d0a460d SHA-256: e5f52d96bc483e0d87e22a156bb852244ebcb7a7e72f3a2951d210a16a6cc51b
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 0.9997

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://philabc.ru/uplcv?utm_term=bharat+ane+nenu+full+telugu+movie+online PDF link annotation
    • https://blindnow.com/userfiles/file/difetudegubokaxa.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/k36pln0j1l8q1k0ouabh4vmgn2/burisugufagogogol.pdfIn PDF document text
    • https://roadtoring.com/wp-content/plugins/super-forms/uploads/php/files/766342447d53191f653fddf854c1bff8/21777456036.pdfIn PDF document text
    • http://grani-tonkogo-mira.ru/wp-content/plugins/super-forms/uploads/php/files/9c182a8bf40b7f90220dd3f8e74ced1f/zafoxasenamagurerukazoveb.pdfIn PDF document text
    • https://tramhuonghanoi.vn/upload/files/jomuzitaxetabetebinolib.pdfIn PDF document text
    • http://www.advancedevents.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16077a9a6a7944---bovufasuzipel.pdfIn PDF document text
    • https://blackknowledge.com/wp-content/plugins/super-forms/uploads/php/files/d259ffaaea325950cf62b4f3477eb547/butuvi.pdfIn PDF document text
    • https://goactive.hu/wp-content/plugins/super-forms/uploads/php/files/d8737f6ae6827f16094b2643b02065f1/75670845336.pdfIn PDF document text
    • http://9meclinic.com/ckfinder/userfiles/files/bidezu.pdfIn PDF document text
    • https://udachi.co.th/wp-content/plugins/super-forms/uploads/php/files/h4tg4b51dkpohe4odlcm3oe1fk/kimosurajesiwonigex.pdfIn PDF document text
    • https://c4ir.ae/wp-content/plugins/super-forms/uploads/php/files/lk5dr5go9h3qaie7ecv6apf2o1/73495110285.pdfIn PDF document text
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/1606d5dda58c0c---93251781192.pdfIn PDF document text
    • http://ctkupavna.ru/upload/file/41364283698.pdfIn PDF document text
    • https://www.ideaklinikbursa.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074341a626b5---jiwamogenotekanadajokeme.pdfIn PDF document text
    • http://technocom.pl/editor/file/fitubetutazugogeloti.pdfIn PDF document text
    • https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/8b7a84c5d104bca7357497a3281ac494/zazube.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/ibvklt5f84jcdf5bn5bdtt6gm7/nuvikaxobitorokub.pdfIn PDF document text
    • http://shuimotongyuan.com/userfiles/file/lizuneborazojosonu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn 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://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00015f88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15F88 5112 bytes
SHA-256: 4de7d3828753c2dc7ceb216cf41764adad44aa195821296743983b3d218d64ea
font_01_sfnt_off000170d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x170D2 7740 bytes
SHA-256: 3cf4dd5d28e4e7f78095693c540cd585590096377c8ff085e2cdc9927f624a54
font_02_sfnt_off00018934.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18934 11472 bytes
SHA-256: cb0c0a35202b6984aff889cbddcd0981694bd8633ab4f1acea661c3efe77d617
font_03_sfnt_off0001b092.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B092 16164 bytes
SHA-256: ead7fd593d7f5feef6f283420e9b55f8fa4552f107c64b0063d474dd3355abd8

Open this report in the interactive analyzer, or submit your own file for analysis.