Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa47b936fd016ef1…

MALICIOUS

PDF

74.9 KB Created: 2021-03-27 21:42:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 0527aa40a4582494e6de1c9451fd5f22 SHA-1: bb74b01aaabc9168097e53f6287bfb2a11722155 SHA-256: fa47b936fd016ef18e3fa341679cea26547aa925b718fd6007ef10c6b393ac28
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a URL that is presented as an installation manual, likely a lure to trick users into visiting a malicious site. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a potentially harmful resource.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://midufefew.ru/wb?keyword=acorn%20superglide%20130%20installation%20manual PDF link annotation
    • https://cdn.sqhk.co/sorubajuzoxe/VhbUkxY/oxygen_atom_model_3d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491175/normal_60207ddd1058b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456984/normal_60592eb25b2e3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427509/normal_5fc9a9a85fd75.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366035/normal_5fccfdc9e916c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421944/normal_5fec09cb7b77a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376379/normal_5ffd2b3158ad6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454562/normal_5ffff5c8c737a.pdfIn PDF document text
    • http://nadefememidep.medianewsonline.com/getagiboxobofeturona.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454164/normal_602423c80c7a5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365560/normal_600f3a8501533.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403418/normal_5fe07d1b0df57.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459937/normal_604b51731de6f.pdfIn PDF document text
    • http://mufutekuson.getenjoyment.net/demugudolew.pdfIn PDF document text
    • https://cdn.sqhk.co/talexadu/NFRiahj/11159864879.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417824/normal_5fc779b91ab89.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377935/normal_5fdd1b5d22e15.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366009/normal_6032e77ea6361.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wavexijazibivat.myartsonline.com/toposijodaxigetabot.pdfIn PDF document text
    • http://limoxukuk.atwebpages.com/batch_script_tutorial.pdfIn PDF document text
    • http://wilaroxu.atwebpages.com/wild_animals_name_list_with_picture.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cfc16afa-28f0-4b71-9373-8b5c303d993a/what_is_formed_when_two_or_more_atoms_join_together_chemically.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cfecc2cf-6a31-4961-950d-0904de24e2e6/crear_hoja_de_vida_sencilla.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4dbfb9b-2665-457e-a59a-d2a33420bc37/how_to_say_greatly_appreciated.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_off0000e820.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE820 5740 bytes
SHA-256: a91638f9bcaf2368a90eb07de40596ba00353abe23f1504a87a53b3fc3c2e6b2
font_01_sfnt_off0000fb96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB96 10008 bytes
SHA-256: 11270238d0f7290502a9af0e40d8bf0a57c47dca7b07812fff7cfa2da2d0a3e6

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