Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb0b61cc67c50b69…

MALICIOUS

PDF

73.8 KB Created: 2021-04-03 21:34:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: ff0c702c5a39841f6179a57a606bf2dc SHA-1: d3ec7d499fc0f29eb373ae09094dac2f54d51fa3 SHA-256: eb0b61cc67c50b69be20fa0a480e742682ce096bab269c2c7d230539ff0f7bbd
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is a PDF that contains numerous embedded URLs, many of which point to disposable hosting services. Heuristics indicate it's a link farm and has been flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. The presence of embedded URLs suggests an attempt to redirect users to malicious sites, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://soxebez.ru/123?utm_term=guided+meditation+anxiety+5+minutes PDF link annotation
    • https://cdn.sqhk.co/mifijizudi/ahejogc/chart_dragon_type_pokemon_go_list.pdfIn PDF document text
    • http://fezelegafefuv.mywebcommunity.org/define_curriculum_development_process.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366993/normal_6060b30b658ee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446635/normal_6050276d916f9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445555/normal_6018e968a6b19.pdfIn PDF document text
    • https://cdn.sqhk.co/busumodofu/hpp39ic/curriculum_guide_in_filipino_grade_11.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489240/normal_601c9671a003c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491671/normal_605966565b602.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454668/normal_5fe23fec61582.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404966/normal_6029b62d863ca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490974/normal_601f566eaec38.pdfIn PDF document text
    • http://sebevifa.getenjoyment.net/majazavorabajinegomosil.pdfIn PDF document text
    • http://pedaxofanor.mywebcommunity.org/19294161434.pdfIn PDF document text
    • https://cdn.sqhk.co/fugapaloter/ieGhg4u/86083709323.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409393/normal_603f35abf072b.pdfIn PDF document text
    • http://rajajime.mypressonline.com/74287362401.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495251/normal_5ff3736c79395.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369786/normal_601e725576e70.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/wekibik/sharp_4k_android_smart_tv_58_inch.pdfIn PDF document text
    • https://s3.amazonaws.com/padosumifubobo/46061090650.pdfIn PDF document text
    • https://s3.amazonaws.com/mujesogi/tupefabo.pdfIn PDF document text
    • https://s3.amazonaws.com/xalexojaxipud/13147689178.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_off0000e2cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2CD 5168 bytes
SHA-256: 1b4be813e25cecf0f6dc26f3f3b841a701d3e75465a2776d1ccf1e0be11f5f06
font_01_sfnt_off0000f45f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF45F 10544 bytes
SHA-256: 34a26ddcdc3981b016e70df2ee9b7882047c08ec01f4e6d279a641c204265f31

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