Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3b7e2b61d9d5ca8…

MALICIOUS

PDF

93.5 KB Created: 2021-03-01 08:02:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 6952b39768532440ed2a728fd10951ef SHA-1: 14136c1fc4f41ccc68e6b01722bcf7f7a04a4db3 SHA-256: d3b7e2b61d9d5ca8fbf8982f54032ab12e794e604e869cc2260291a447298d9e
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-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.
  • 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://xajibur.ru/aws?utm_term=cannon+valley+forge+64+gun+safe+reviews PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4407086/normal_601693052fe30.pdfIn PDF document text
    • http://gromstroy.com/wiley_corporate_solutionsarqth.pdfIn PDF document text
    • https://cdn.sqhk.co/vixemujomu/sLjjFmq/finuzik.pdfIn PDF document text
    • http://cmbespaceclient.xyz/los_escritores_de_la_libertad_librolripc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393485/normal_5fff780311340.pdfIn PDF document text
    • https://cdn.sqhk.co/lagazowasobo/oSu0jjr/xixewezomaze.pdfIn PDF document text
    • https://cdn.sqhk.co/fufigavaki/hR9Sggd/download_jump_jump_ball_2020.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383925/normal_60308ffb23970.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488103/normal_5fe3c930ddd47.pdfIn PDF document text
    • https://cdn.sqhk.co/torixugajo/jbigXzu/food_wars_season_5_episode_11_full_episode.pdfIn PDF document text
    • https://cdn.sqhk.co/pezolaje/fljagjb/neon_city_riders_guide.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470552/normal_5fc79e0ad3af6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460233/normal_6028f2f3ee14f.pdfIn PDF document text
    • https://lalidusuferub.weebly.com/uploads/1/3/4/4/134440540/sepejemasaxaz_giriwit_sefisisimofapip_tawolawu.pdfIn PDF document text
    • http://kzrovk.xyz/jolusavofotojokisaxaribih7aw3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off00013021.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13021 5336 bytes
SHA-256: cf36a4c10599f71fdc387d03b0871ca5854534693d8e670c3c0a86539dca15f5
font_01_sfnt_off0001427a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1427A 11348 bytes
SHA-256: ca20bb9ff4b19cea3cddd419d1ee2eaa17107e7980bf11800800f33f08770af7

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