Malicious PDF — malware analysis report

Static analysis result for SHA-256 222eb709ffa95b62…

MALICIOUS

PDF

82.4 KB Created: 2021-03-21 03:59:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: f324fe42b3deea12bc35aac247007623 SHA-1: 584a618adf80acaa4ec3761d5caf7077202643c7 SHA-256: 222eb709ffa95b6218feffb63cef832358b3ad3687b6003af1b11c2658832e49
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 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://xajibur.ru/123?utm_term=efset+test+answers+2018 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4451940/normal_5fee841154aba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486053/normal_601b61d38440d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371025/normal_604ad14a04b0d.pdfIn PDF document text
    • https://cdn.sqhk.co/jawezumate/iNyjaii/48897861320.pdfIn PDF document text
    • http://generatorsale.ru/the_magicians_season_5_episode_1395met.pdfIn PDF document text
    • https://cdn.sqhk.co/xolanikipiz/siidMGv/sandwich_restaurants_near_me_now.pdfIn PDF document text
    • http://idealicaitalia-ufficiale.site/mumiledered1uub2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366005/normal_60550e9b12c68.pdfIn PDF document text
    • http://hotgirls.host/kexujasabajuronajadu9ay1y.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411001/normal_5ff0983da551b.pdfIn PDF document text
    • http://fb-ig-copyright.com/37780531465nm0mm.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418587/normal_5fdd79e0c3f3c.pdfIn PDF document text
    • http://masterpowerpoint.com/roguelands_crafting_guidet4d3e.pdfIn PDF document text
    • https://cdn.sqhk.co/siripeka/oh7EEgh/gokefixiwujupejexi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477626/normal_5fd3cb7813917.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420760/normal_604d1ad196a4c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5959bce-52c7-4f32-8ba1-2af2164b01d5/jiwazogi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f063fe2-467e-4019-82c7-fd8a8b6ba4da/sunosi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf59694d-7994-4b0a-b0fb-4f06c31b8f20/pc_dictionary_english_to_hindi_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7afd590a-aae2-4644-9f9f-bb3fe82a57de/what_are_the_three_main_cognitive_theories.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e02287d1-17d9-4b29-9c64-e53edd9509c7/77628360844.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_off000102f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102F1 5296 bytes
SHA-256: 7fe41e9d58560a2f65199aaad94c722e3139075c9d0b65e632d43a3ddecb94ef
font_01_sfnt_off0001151e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1151E 11900 bytes
SHA-256: f318115bed80c44a540028430b9d4c2b8e2eb9da952c0f077f7d515aa669e2e7

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