Malicious PDF — malware analysis report

Static analysis result for SHA-256 051a42a400964d01…

MALICIOUS

PDF

75.1 KB Created: 2021-03-28 12:27:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 777825c564f00611fb9242b019bc7f51 SHA-1: 47794061560d2360e5f5d379ec7c8f1c59191479 SHA-256: 051a42a400964d01ede63c54fcf47fd576757d95375ca36f6ca30fa2f990d57f
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 0.9995

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://bologen.ru/123?utm_term=newspaper+template+google+docs+vintage PDF link annotation
    • http://losopefopamusoz.sportsontheweb.net/the_anglo_saxon_chronicle.pdfIn PDF document text
    • http://kofojoxake.mygamesonline.org/sabixuxoxuwazimokomi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387061/normal_6042c7b813214.pdfIn PDF document text
    • http://vogolimipogusoz.mypressonline.com/25115853048.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465938/normal_5fdd1a92dd831.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495271/normal_6004bf85b91f7.pdfIn PDF document text
    • http://tozidak.mygamesonline.org/robotics_artificial_intelligence_file_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419410/normal_5fe5e868740ec.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pubadaxakefiwi.rf.gd/electrical_engineering_subjects_list.pdfIn PDF document text
    • https://cfc603e6-7cd4-4c42-812b-9722deb80ae4.filesusr.com/ugd/0e9fc2_5f3d42096a204f56aab8b76670271e58.pdf?index=trueIn PDF document text
    • http://kizuxaw.rf.gd/30153267637.pdfIn PDF document text
    • https://s3.amazonaws.com/rodigapigeta/professional_video_maker_apk.pdfIn PDF document text
    • https://f37c3615-20b0-4e70-b1e7-2acf34113780.filesusr.com/ugd/1e533a_8490b1e4b7404c02bc1123dccd23745c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rovuweraja/zijededuwewirutebivefed.pdfIn PDF document text
    • http://woriloxalodar.rf.gd/waiting_for_the_barbarians_poem_meaning.pdfIn PDF document text
    • http://fuluxewamotate.atwebpages.com/construction_project_risk_assessment.pdfIn PDF document text
    • http://mekamijixakino.epizy.com/do_lab_grown_diamonds_keep_their_value.pdfIn PDF document text
    • https://e1eccfe9-8888-4f52-a155-e9c8e84e0752.filesusr.com/ugd/4fb05f_6154a85036fe493f9d59874e9236478e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gawabog/fluticasone_propionate_davis_drug.pdfIn PDF document text
    • http://zotubune.myartsonline.com/fevalono.pdfIn PDF document text
    • http://wudotope.rf.gd/selective_perception.pdfIn PDF document text
    • https://s3.amazonaws.com/ragejufa/45084809629.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_off0000e5b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5B5 5512 bytes
SHA-256: f2df3929e3a16f0449ee5a3a2fe68ed6108db5de0e720356e33e6a3d52b52e18
font_01_sfnt_off0000f87e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF87E 11208 bytes
SHA-256: 1f685cc37b8853bbca79255428869c4bfb28e49b1f9ca1e53f54e7a072044397

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