Malicious PDF — malware analysis report

Static analysis result for SHA-256 84f505abe50c64a7…

MALICIOUS

PDF

71.0 KB Created: 2020-12-31 03:22:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 3029e016c238e7617bdb9e9635130194 SHA-1: bf920eaa31856592a6d312f17b9a5094695a660d SHA-256: 84f505abe50c64a7213bf0764f78e7bce4b5f2dc827f05738afed16eee7567c2
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 0.9997

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://trafffi.ru/strik?utm_term=fake+gps+location+ios+13 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4464532/normal_5fc04fb81b7f5.pdfIn PDF document text
    • https://xasukibumit.weebly.com/uploads/1/3/4/7/134749231/28dc27c7713f.pdfIn PDF document text
    • https://gebapawuvafiv.weebly.com/uploads/1/3/4/5/134519736/5123956.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/palikuvexake/tv_guide_tonight_central_queensland.pdfIn PDF document text
    • https://s3.amazonaws.com/jasadavebaga/avent_double_electric_breast_pump_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/fedufiporara/35245778100.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16b2b013-183b-43a7-835d-482bcd7fe763/wasekuto.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3f653a3-8574-4a58-80e6-5a499ac68cb4/naxavobifajinusupib.pdfIn PDF document text
    • https://s3.amazonaws.com/xedewofuretujo/kexon.pdfIn PDF document text
    • https://s3.amazonaws.com/dalava/best_paid_vpn_for_android_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/26808d2b-28b7-426d-8270-ce2ec05e6806/bein_sports_live_stream_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/pafiganovavi/rufudipem.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/92865f68-a07c-4674-be36-a34c50e6723d/old_man_and_the_sea_study_guide_questions_and_answers.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_off0000d9e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9E0 5240 bytes
SHA-256: c1a6064dad8436cdf3b8ef27573e15355c8d96a34aafd15a1ca702fd690d7ba3
font_01_sfnt_off0000ebe1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBE1 10484 bytes
SHA-256: 3ed92d0809008321c32863be43139b78f4c2a3e83c80f8d47e51474f4e344889

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