Malicious PDF — malware analysis report

Static analysis result for SHA-256 06bee4f16273ddc8…

MALICIOUS

PDF

84.2 KB Created: 2021-03-13 15:19:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 63f01c96cf78e9f17b73242d3513fa5d SHA-1: c9de2d59e82b1de49e44e2eeafa03710386e31db SHA-256: 06bee4f16273ddc8436014572bf9be299b8d71be50bf39a598e51817fcb87a00
126 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The document contains numerous embedded URLs, many of which point to disposable hosting and utilize UTM parameters, suggesting a phishing or spam campaign. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports this, indicating the PDF is a link farm on disposable hosting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://leonvi.ru/strik?utm_term=best+stocks+to+buy+for+2020+in+india+short+term PDF link annotation
    • https://cdn.sqhk.co/wemitupu/Qhhjjie/dry_fruit_slicer_cutting_machine.pdfIn PDF document text
    • http://kijekidajefi.getenjoyment.net/neil_gaiman_sandman_tv_series.pdfIn PDF document text
    • https://cdn.sqhk.co/dexasubu/e2ThdlC/kojimajadem.pdfIn PDF document text
    • https://cdn.sqhk.co/jetobatu/jehe3jd/67978826947.pdfIn PDF document text
    • http://kitukotobov.medianewsonline.com/56037417611.pdfIn PDF document text
    • https://cdn.sqhk.co/fuvebopeweb/fXUyjjz/xipegedopukegut.pdfIn PDF document text
    • http://zagodutaf.getenjoyment.net/starbucks_barista_salary_and_benefits.pdfIn PDF document text
    • https://cdn.sqhk.co/pesegozod/cgeghgv/secret_files_tunguska_nds_rom.pdfIn PDF document text
    • http://pifozuvarivin.22web.org/bifogomudaravekopudom.pdfIn PDF document text
    • http://nulatapukedu.scienceontheweb.net/37989879616.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/safenalavojuwu/retuzijeviv.pdfIn PDF document text
    • https://f495c71d-628d-4070-9a3d-b699cbb46ba4.filesusr.com/ugd/d99ef3_c47d83c7c89b4a58a09830c1d2011b51.pdf?index=trueIn PDF document text
    • http://vagakidid.epizy.com/75090019964.pdfIn PDF document text
    • http://bisegigosos.epizy.com/82505881978.pdfIn PDF document text
    • https://8ed62699-7d02-4439-b935-4286882ef7d4.filesusr.com/ugd/229b11_f7bafaa5cb534d8cb6eb205315b896df.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xasovewipeje/why_did_my_remote_starter_stop_working.pdfIn PDF document text
    • https://s3.amazonaws.com/jeworurowam/annual_credit_report_experian_not_working.pdfIn PDF document text
    • http://bazejufojowopor.epizy.com/47240971726.pdfIn PDF document text
    • https://2571d5ef-7130-409a-b87d-c3fd18a83f30.filesusr.com/ugd/71fc55_bc794f38517f419ca2f9a5cbb591e1b7.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gozilum/dixipagisonafikikolewes.pdfIn PDF document text
    • https://s3.amazonaws.com/pirofopafu/brave_browser_64_bit_free.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_off00010977.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10977 5856 bytes
SHA-256: eff20e90861af7bbc600ddb1926949abf7f27330dd25cb87d7f025735ab3049f
font_01_sfnt_off00011d50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D50 11100 bytes
SHA-256: bc2829c84785d4ce9b20d4c4c91f00b04ce8fbcd31e775b618fc624d1f8f2122

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