Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1d6dbc2b2362ea4…

MALICIOUS

PDF

84.8 KB Created: 2020-11-13 09:25:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 0792850be9150d87afe8111e8f363e1b SHA-1: de1c0cd1bd331976d2c9ad8a3f4f424dee03b2e1 SHA-256: c1d6dbc2b2362ea4b5a66c78ff42a28290bdc3a74c5817617233dbe41d5eebf2
156 Risk Score
Tags
free-cdn-ebook-manual-lure

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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://trafffi.ru/strik?utm_term=part+time+job+persona+5 PDF link annotation
    • https://mojivimimujovo.weebly.com/uploads/1/3/0/8/130874437/vepulakanug.pdfIn PDF document text
    • https://zomijozefabeten.weebly.com/uploads/1/3/4/6/134636393/zokufulil_fogedojilivox.pdfIn PDF document text
    • https://gusumadanu.weebly.com/uploads/1/3/2/6/132695601/noredutegolime_jaxiku_pedolonu_xotokaguxizowo.pdfIn PDF document text
    • https://xosetumigex.weebly.com/uploads/1/3/4/3/134371377/f1528f5bbde4c.pdfIn PDF document text
    • https://fisalusul.weebly.com/uploads/1/3/4/3/134341538/8762410.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/gateme/foduneliduwopamobudulev.pdfIn PDF document text
    • https://s3.amazonaws.com/rexogeguxosix/8706923335.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/63990d4c-99f2-4e84-b665-ffc57d2bd410/bazetexixipubinukex.pdfIn PDF document text
    • https://s3.amazonaws.com/fedure/pine_hill_taxes_online.pdfIn PDF document text
    • https://s3.amazonaws.com/genedonapubefe/70637152879.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/efe2877c-5adc-46bd-bb01-006a6fee00da/wuzoxuguwizawegovunagalo.pdfIn PDF document text
    • https://s3.amazonaws.com/kavugusepe/formatos_sencillos_ordenes_de_produccion.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/20288604-615f-4810-a384-c107eb2bd060/wuxefiresut.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/207a3f17-d64a-4340-8c2d-0cf11ef24b8f/sonorikisawageto.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/kowogebekukixa.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001111e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1111E 5276 bytes
SHA-256: 81f707e2e897a689e92d29adeb04d80eee9e0ece03a13a930e672547dd8c59b8
font_01_sfnt_off000122f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122F6 10304 bytes
SHA-256: 99093dd651a899d9001e679fe958cef725be87090db685d7e1174ba2c99f6b94

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