Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d4b78a8da1db143…

MALICIOUS

PDF

70.2 KB Created: 2021-03-27 22:28:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: c5cccbe79b6fd5af189bfd219b7f26a3 SHA-1: b3affdb22eb35d8881b466983864a88290a09e5c SHA-256: 8d4b78a8da1db14340bf779677e25b3a65e59b2a1c3b21adfd4dafac60b29a42
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 0.9996

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://pelibifir.ru/wix?keyword=cnn+10+january+13+2020+youtube PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4375507/normal_60159244e0d17.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4530151/normal_60436ac6d0ace.pdfIn PDF document text
    • https://cdn.sqhk.co/tisojubew/aYhgE3O/juloxopulozofatufepaditaz.pdfIn PDF document text
    • https://cdn.sqhk.co/tezasevimab/bgdOhdG/matchington_mansion_cheats_level_1781.pdfIn PDF document text
    • http://pibarulajido.getenjoyment.net/dimepuvowaz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4505839/normal_5fc909341f819.pdfIn PDF document text
    • http://vijexibat.mywebcommunity.org/fokerofigexuxuja.pdfIn PDF document text
    • http://xatamekele.iblogger.org/paketil.pdfIn PDF document text
    • http://levitajagukog.scienceontheweb.net/annexure_hssc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374978/normal_602204a344355.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465924/normal_604ebf07c768e.pdfIn PDF document text
    • https://cdn.sqhk.co/tikexumivu/F4Meljb/tawalewebog.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447108/normal_5ff91ea943dce.pdfIn PDF document text
    • http://pebunoguge.mygamesonline.org/harry_potter_half_blood_prince_blurb.pdfIn PDF document text
    • https://cdn.sqhk.co/tivinarafuvu/hhgeGjd/monster_maker_5e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://toromatajixuru.epizy.com/cds_syllabus_for_ota.pdfIn PDF document text
    • https://167c2301-eccc-4e3a-a609-38a4f17b9bf8.filesusr.com/ugd/b1dabf_a2e3e83461e44b0fb1fb4f3d1f4ce963.pdf?index=trueIn PDF document text
    • https://80cb706b-a9cc-40e6-9cd2-ad5688d6c4a8.filesusr.com/ugd/c84a73_afe2936c80d640c1bb8207240666d134.pdf?index=trueIn PDF document text
    • https://d102a0f2-001f-4998-bb0a-88ac30ac05b5.filesusr.com/ugd/771ea4_16c2073db96f4949a2ac542f5f73043b.pdf?index=trueIn PDF document text
    • http://jojomuge.epizy.com/maytag_epic_z_washer_error_code_f01.pdfIn PDF document text
    • https://48e6b720-b653-4920-beb0-7ef171ab6ab9.filesusr.com/ugd/d9d1f5_26b14074ac4b44599794cbdb04e45b9f.pdf?index=trueIn 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_off0000d621.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD621 5184 bytes
SHA-256: f3095df66fc78f4b324326428eb00665ff1bddd3ac048a6b749c916ab7743d53
font_01_sfnt_off0000e7e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7E0 10292 bytes
SHA-256: e76681a24b213cbead46a21dafe1aa11aaa71783f23ff29a9157247cc35190ae

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