Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f2a0ba3612bbf93…

MALICIOUS

PDF

77.5 KB Created: 2021-04-21 05:01:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 012039a3ffea9ac669da87c367220623 SHA-1: 714730e17fe3317863bba702f96c07bebc75c78f SHA-256: 5f2a0ba3612bbf933b4b7d530ed20d7e0ef82bceb37650bf85b54c787cb69966
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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://druttle.ru/strik?utm_term=jorge+luis+borges+el+aleph+pdf+descargar PDF link annotation
    • http://gefokugok.getenjoyment.net/berta_isla_javier_marias.pdfIn PDF document text
    • http://zomoxoxuriw.mypressonline.com/argot_definicion.pdfIn PDF document text
    • http://chtotakoeverti.biz/chaos_theory_in_art37bco.pdfIn PDF document text
    • http://geleostone.online/80036541602uw8zj.pdfIn PDF document text
    • http://bcpzonasegur4viabcp.com/loxekixsrooa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://65f7c47b-6fa2-4aed-9649-637438a88329.filesusr.com/ugd/8fb471_64183db3e7ce49b593ded45eea09d1a0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lemerisinivum/animals_martin_garrix_song.pdfIn PDF document text
    • https://2e96d104-cacc-4af9-914c-411927af6089.filesusr.com/ugd/0f866b_721687482d82458587db13bbb9b720f2.pdf?index=trueIn PDF document text
    • https://d45380bd-a93d-4ef2-b2bd-4c7806d1f6db.filesusr.com/ugd/5d2cf3_8ec921b1e6524917aca951cb9b6d63cc.pdf?index=trueIn PDF document text
    • https://b3709dad-42f4-4621-9b7e-74d31ca978cd.filesusr.com/ugd/f91cf1_0b56a0a60a9e4d2e9476925a6895aeba.pdf?index=trueIn PDF document text
    • http://sufixis.myartsonline.com/adobe_online_viewer.pdfIn PDF document text
    • https://s3.amazonaws.com/tujeviwakirawu/ardaas_karaan_movie_720p_filmywap.pdfIn PDF document text
    • https://d5cf7a15-73c9-49c9-ad57-d4f0303abb0c.filesusr.com/ugd/0d002d_087b8a8739704a0dae45fd170fc689bc.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jaloto/xitikuzoxa.pdfIn PDF document text
    • https://fac30f9c-1bc3-4ff6-ac40-7ced1d2a170b.filesusr.com/ugd/3b7182_b58cb09a777e47e7910649737fefa424.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xujitezu/19442037175.pdfIn PDF document text
    • https://8d2868a3-57b7-484c-81f6-493c1c4f5daa.filesusr.com/ugd/a8ca0f_8ac08505ea464ee786c53da16e2d0d3d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mokixetat/losifufebolex.pdfIn PDF document text
    • https://de2ee6d5-caaa-4265-b15c-40100ab77d99.filesusr.com/ugd/d43733_a5cd9414b2144c7e8d1fa7dc2eb3a041.pdf?index=trueIn PDF document text
    • https://11627308-8c8f-4f08-99ed-0ad85160907d.filesusr.com/ugd/682d1c_282dcab6860c46cbbe9a0681565b9c29.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/ruzaganog/english_teaching_methods_and_techniques.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_off0000edd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDD2 5544 bytes
SHA-256: 9fca76767949111576719e238304fe35080e60639d7ff8a45cebed622ccee3bb
font_01_sfnt_off000100a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100A5 11712 bytes
SHA-256: 9ffdfe9c1a47b1ec135bb87ef61d8406869edf0de44d109a4546fc22b2e31927

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