Malicious PDF — malware analysis report

Static analysis result for SHA-256 094d7ef1f92af24b…

MALICIOUS

PDF

73.9 KB Created: 2020-11-20 06:30:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: be4fa77f81456cdd0770bb48b723d1c8 SHA-1: eaed52d93d9a81591896c901bd42af6484416605 SHA-256: 094d7ef1f92af24b73191ba9b9e3fee33a5a874757e4a4e7e0e0e305a4bb180c
126 Risk Score

Malware Insights

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

The PDF file contains embedded URLs and heuristic firings indicating it is a link farm designed to redirect users to potentially malicious sites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were directly extracted, the PDF structure and embedded URIs point towards an attempt to redirect users to external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://trafffe.ru/123?utm_term=how+to+make+a+magic+the+gathering+deck PDF link annotation
    • https://metipejoxeve.weebly.com/uploads/1/3/4/7/134725173/9347253.pdfIn PDF document text
    • https://bibeliki.weebly.com/uploads/1/3/0/7/130738572/kogedugutisizo.pdfIn PDF document text
    • https://lorinifufa.weebly.com/uploads/1/3/4/3/134357706/1a38628f18c.pdfIn PDF document text
    • https://laxefepi.weebly.com/uploads/1/3/4/5/134528647/pinixugupibax-zokonimonem-dawupekejoripat-sogabusiwago.pdfIn PDF document text
    • https://tilobumofiraji.weebly.com/uploads/1/3/4/4/134492377/fudebuvurukotu_dodotab_mavazemazij.pdfIn PDF document text
    • https://visuxotilan.weebly.com/uploads/1/3/4/5/134593687/6798043.pdfIn PDF document text
    • https://nuxagaselupig.weebly.com/uploads/1/3/4/0/134016775/lodizujosegu.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/faluzotixupi/when_i_grow_up_worksheet_preschool.pdfIn PDF document text
    • https://s3.amazonaws.com/guvovigo/56233271156.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/bpsk_transmitter_and_receiver.pdfIn PDF document text
    • https://s3.amazonaws.com/bezegoluzose/rapumorodipafiz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de4e46d2-cb24-45f6-ad7d-c16ed1a8fd04/mega_man_bass_rom_snes.pdfIn PDF document text
    • https://s3.amazonaws.com/fexuror/algebra_2_geometric_sequences_and_series_worksheet.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_off0000e57e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE57E 5260 bytes
SHA-256: bedbcff460659d128f1e6a7c64469411571450f50df57fca101db1e1d24dc1d8
font_01_sfnt_off0000f744.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF744 10348 bytes
SHA-256: ec06a432b785a6da472599323120d1f02a973f29f41894a4820f6186a392520b

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