Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c0d580d8f23bc33…

MALICIOUS

PDF

142.7 KB Created: 2021-03-31 19:44:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 979f43c95021ec242a65f40c2c51eb34 SHA-1: ecf7c3042b9ff2e0e09f1e316c4139e4f0b7d22e SHA-256: 0c0d580d8f23bc33d8941586d6b30cc470ad7b4c27f1f360e7b2e79d729bc28c
186 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 0.9997

Heuristics 6

  • 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.
  • 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://xezojetit.ru/strik?utm_term=new+york+dma+counties PDF link annotation
    • https://vesukinixemijuw.weebly.com/uploads/1/3/2/6/132696016/7167562.pdfIn PDF document text
    • http://zebrait.fun/vinyasa_krama_yoga4riuf.pdfIn PDF document text
    • https://cdn.sqhk.co/xusarukave/vJicGpw/businessworld_publishing_corporation.pdfIn PDF document text
    • http://varistop.site/63185587674q4tnv.pdfIn PDF document text
    • https://cdn.sqhk.co/wudenedu/jigghjT/nikah_halala_movie.pdfIn PDF document text
    • http://presentinsta.online/lightroom_classic_presets_location_mac8yz93.pdfIn PDF document text
    • https://towowiwegopute.weebly.com/uploads/1/3/4/0/134019464/1955253.pdfIn PDF document text
    • https://cdn.sqhk.co/zotofoza/QUPhaih/22528487357.pdfIn PDF document text
    • https://lozibojugor.weebly.com/uploads/1/3/1/0/131069840/xotiwisije.pdfIn PDF document text
    • https://dobabolomibela.weebly.com/uploads/1/3/2/6/132681713/xotexoku.pdfIn PDF document text
    • http://card2card-perevod24.site/livret_temoin_de_mariage_a_imprimeraznb2.pdfIn PDF document text
    • https://rixajijinuroje.weebly.com/uploads/1/3/4/4/134473879/5cb89aa944232c.pdfIn PDF document text
    • http://topcreditreport.info/5004674269793mdf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://620678a0-8f5b-407b-881a-8a96a128c1c4.filesusr.com/ugd/25b7a6_4ee7c2d3860a4b3991175afc8220910d.pdf?index=trueIn PDF document text
    • https://6ba8113a-99dc-4618-97bf-d7180f10ff72.filesusr.com/ugd/b6edda_c343bb41592e439d945b4087facbcf43.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ea3cf23-5c1b-4ee4-9914-5ed85aa28196/zoxejinitomewizivegif.pdfIn PDF document text
    • https://a161ff94-1a6f-4367-b6f8-8e513a5e676d.filesusr.com/ugd/4c7633_fc19434581d443919a9adf67493ac178.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/659aa567-506d-4d94-8375-4d441dfb6825/road_signs_and_their_meaning_in_kenya.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/334538f9-3748-4c95-b84b-734b4c8ab0c6/77213525564.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001e730.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E730 5164 bytes
SHA-256: 78e1d0ba8b34e45753ce0b75a65298bcd7c5c990154c8a6a9a9df924d9697ca7
font_01_sfnt_off0001f8c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F8C2 11948 bytes
SHA-256: 8ab800b53855d1ff018b421310fb58b422c6a4ccd2543861a4d6506da79d43ac
font_02_sfnt_off00021f9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x21F9F 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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