Malicious PDF — malware analysis report

Static analysis result for SHA-256 1605f9b6e07c0de1…

MALICIOUS

PDF

80.4 KB Created: 2021-05-18 09:19:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: cc1eae1d7b2e3f8af99a43b3f48366e7 SHA-1: 1d8eb6a1eaff20f3f4b9441690216ead8f53d2ab SHA-256: 1605f9b6e07c0de1b6465e91a442f6b4f378163d12b68e29e461184ca7aacf32
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 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://mezovuduw.ru/strik?utm_term=solving+systems+of+equations+by+graphing+worksheets+pdf PDF link annotation
    • https://ramitafot.weebly.com/uploads/1/3/4/3/134340854/xekanodifogo.pdfIn PDF document text
    • https://dizogesutupini.weebly.com/uploads/1/3/4/6/134631076/62a925319c.pdfIn PDF document text
    • https://gefetejumifigo.weebly.com/uploads/1/3/4/6/134688955/7ff934a6b.pdfIn PDF document text
    • http://kujazudoxiro.22web.org/physical_inventory_report_in_sap_abap.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/d050282d-baf8-471c-9dc3-2b64b3892123/15562152630.pdfIn PDF document text
    • http://xujiril.rf.gd/atom_history_timeline.pdfIn PDF document text
    • http://sakigekoxigukil.epizy.com/73557706058.pdfIn PDF document text
    • http://rewokop.epizy.com/certificate_of_employment_with_compensation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f45b83e-bbc7-4c8f-873d-b018ec233b46/10997592515.pdfIn PDF document text
    • http://doganofikaraw.epizy.com/liberia_civil_war.pdfIn PDF document text
    • http://vemevusakeke.epizy.com/sasaxabisotigopiso.pdfIn PDF document text
    • http://voderekop.rf.gd/kosedurat.pdfIn PDF document text
    • https://s3.amazonaws.com/fekife/los_doce_cuentos_peregrinos_de_gabriel_garcia_marquez_resumen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1cd03325-30ab-4815-8395-c77dc5aa6d6e/26206422873.pdfIn PDF document text
    • https://s3.amazonaws.com/gotenukevepunin/53157060068.pdfIn PDF document text
    • http://xivefasojag.epizy.com/comment_regrouper_plusieurs_en_un_seul.pdfIn PDF document text
    • https://s3.amazonaws.com/baxegezivumi/95502101111.pdfIn PDF document text
    • http://dimavimamanonev.rf.gd/rikki-tikki-tavi_comprehension_quiz_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd47d7fd-d2e5-4472-a091-68671f3821cf/jufavu.pdfIn PDF document text
    • http://zozasozam.epizy.com/topep.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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f5b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5B1 6144 bytes
SHA-256: aa1470075c6c6095d8a1c5d8a8cf406e03a203cff077a2fa861d545d5b7a4be7
font_01_sfnt_off00010a78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A78 11488 bytes
SHA-256: 8f656cb3c449da684b8a0eadb59f9f48504785b84f2c13c8a23f2cbb9d614771

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