Malicious PDF — malware analysis report

Static analysis result for SHA-256 7bbe08f18ce64ea0…

MALICIOUS

PDF

77.8 KB Created: 2021-05-24 04:23:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 4770ca076a25ef57f08a43588ecc1f6d SHA-1: 19a07f68711e84647d8fb3eeb231ce7aa7eff628 SHA-256: 7bbe08f18ce64ea0f8ccdd2fc77fc285c6228f3a8c04e4d6e67f236b48a32819
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://midufefew.ru/strik?utm_term=jdr+fr+star+wars+d6+%25C3%25A9dition+2.5+pdf PDF link annotation
    • https://sodukosikel.weebly.com/uploads/1/3/4/5/134598711/nizutefirikuvi_taponabipepesi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371543/normal_60217837e4c4f.pdfIn PDF document text
    • https://malosana.weebly.com/uploads/1/3/5/3/135323031/1278269.pdfIn PDF document text
    • https://nakidero.weebly.com/uploads/1/3/4/5/134524904/timaxibed_virazod.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383804/normal_600922798bea6.pdfIn PDF document text
    • https://xabizukilitexe.weebly.com/uploads/1/3/4/3/134335342/9167703.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480423/normal_5fd79c7aa93e3.pdfIn PDF document text
    • https://zojovotonoturur.weebly.com/uploads/1/3/5/3/135348007/romamubetipibajipuk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377909/normal_5fc69a0f5c433.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/serogajugomiji/childrens_short_bedtime_stories.pdfIn PDF document text
    • https://s3.amazonaws.com/gogoxowiniza/voce_atingiu_o_limite_de_netflix.pdfIn PDF document text
    • https://s3.amazonaws.com/bokelur/cbse_10th_compartment_exam_date_sheet_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/472f9fb2-5a79-46c3-aafe-3018547e9ab3/how_to_set_universal_remote_to_philips_tv.pdfIn PDF document text
    • https://s3.amazonaws.com/tixeligufokup/aprilaire_8600_thermostat_installation_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/kovibu/vikota.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db1fa7f2-0f04-4176-aa7a-bcf3672450ef/56732678872.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_off0000eedd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEDD 5668 bytes
SHA-256: d6ef7b9d20cd96992965cc56aad38beede14c2bd4700089a292a5f202b0a68b6
font_01_sfnt_off00010213.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10213 12180 bytes
SHA-256: b01512aa9016d67fa996d1fb892b1b5be9e3aa91a32710a790e8eb4917fb5cc0

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