Malicious PDF — malware analysis report

Static analysis result for SHA-256 12ad3fd42d20ff8d…

MALICIOUS

PDF

99.9 KB Created: 2021-05-12 19:31:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 4888bedcfce1dd5852bde7ead2050165 SHA-1: 98923f4c86abb39afa0aedb500cb9086169944d4 SHA-256: 12ad3fd42d20ff8d7639d82996ec925c64c15f82e51bcefdfc5ad9630772e726
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 0.9995

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://xezojetit.ru/strik?utm_term=what+is+hao+in+chinese PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4497081/normal_6061f76fc5bdc.pdfIn PDF document text
    • http://trylait.club/garmin_watch_release_dates_202162toa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481059/normal_5fd90fb680336.pdfIn PDF document text
    • http://discount50it.pro/86593832458sql12.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4497071/normal_5fee30a692e94.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372721/normal_5ffe92467b9a3.pdfIn PDF document text
    • http://xerijegodufiw.mypressonline.com/al_itqan_fi_ulumil_quran_english.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419623/normal_60038e2acec5e.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://s3.amazonaws.com/kovilowab/does_heart_problems_cause_high_blood_pressure.pdfIn PDF document text
    • http://lamupimifuban.onlinewebshop.net/case_files_family_medicine_5th_edition_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/sesafefanulokam/orbit_drip_irrigation_guide.pdfIn PDF document text
    • https://d4996ccb-aecf-47c4-aab6-3c4fe022e1b7.filesusr.com/ugd/b7ed05_57b21dccdd154e8c866a375f4777a5df.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wivunonovef/crystal_report_9._2_runtime_files.pdfIn PDF document text
    • https://s3.amazonaws.com/nakevoja/zinadun.pdfIn PDF document text
    • https://s3.amazonaws.com/tobovunoberiki/koguradalivaj.pdfIn PDF document text
    • https://s3.amazonaws.com/mikibetiv/xugexevajut.pdfIn PDF document text
    • https://s3.amazonaws.com/lemerisinivum/gadububujanifanumasiger.pdfIn PDF document text
    • https://s3.amazonaws.com/lokijuronig/14309817366.pdfIn PDF document text
    • https://044e8d80-c429-4a1f-820d-9b443c65b389.filesusr.com/ugd/53c654_861cfad473ef4a37a67c778621fabd7e.pdf?index=trueIn PDF document text
    • http://nifusotajezunur.atwebpages.com/cetosis_en_vacas_lecheras.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f420.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF420 22240 bytes
SHA-256: b4cfa15cd2127e7d6c1e097468211a8887f090608629305295ac6d74f7cb0b73
font_01_sfnt_off000139a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139A8 4560 bytes
SHA-256: 73a83e99ed9638aec722b74741f34cbcab101a5826634389934158a8a18272de
font_02_sfnt_off0001491e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1491E 13648 bytes
SHA-256: 303a4cd1d014f80876ae81891104fee5e68191e4ef68accb436791bcdbd2aa5e
font_03_sfnt_off000171e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x171E4 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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