Malicious PDF — malware analysis report

Static analysis result for SHA-256 8763290f77ce1596…

MALICIOUS

PDF

69.3 KB Created: 2021-09-24 14:18:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 5649de00110720863c18078d0d16c666 SHA-1: a4fe1b5728c29a90b8b375c265a45639a9ce9130 SHA-256: 8763290f77ce15965e79961468fec7e223c5a0833a87554c66bd1d70179fadcd
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by multiple heuristics and an ML classifier. It contains numerous embedded URLs pointing to potentially malicious domains, suggesting a phishing or malware distribution attempt. The presence of external URI links and the classification as Pdf.Phishing.Trojan indicate a likely spearphishing attachment vector. No scripts were extracted, but the overall structure and URL distribution are highly suspicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://smidgel.ru/uplcv?utm_term=my+tv+mod+apk PDF link annotation
    • http://www.cenlafilm.com/siteuploads/editorimg/file/semiwisife.pdfIn PDF document text
    • https://perleyparish.org/wp-content/plugins/super-forms/uploads/php/files/3b700a22c01e62d3361cf17d96516b15/noparixagumuket.pdfIn PDF document text
    • http://global-leasing-management.com/uf/file/14399751423.pdfIn PDF document text
    • http://askaudit.ru/price/kizisozosatikek.pdfIn PDF document text
    • http://bftt.marketsearching.com/upload/files/92891800981.pdfIn PDF document text
    • https://global-brand.net/userfiles/files/79427570977.pdfIn PDF document text
    • https://sikdercollegeofpharmacy.com/scp/ckfinder/uploads/userfiles/files/35945701573.pdfIn PDF document text
    • http://lica-mpt.it/userfiles/files/95278476396.pdfIn PDF document text
    • http://korealabels.com/ckfinder/userfiles/files/rusasaperazi.pdfIn PDF document text
    • https://aquafilling.com/userfiles/file/52836136760.pdfIn PDF document text
    • https://adurucui.com/ckfinder/files/10271293347.pdfIn PDF document text
    • http://southerncross-ex.com/images/blog/file/81333000333.pdfIn PDF document text
    • https://btsmstlucia.com/atomicsteps/upload/userfiles/file/rewinavaxagabiwuxep.pdfIn PDF document text
    • https://hunde-katzen.at/soubory/71471330062.pdfIn PDF document text
    • http://chamdure.com/DATA/files/57040363784.pdfIn PDF document text
    • http://xn--76-6kca8aqc6c.xn--p1ai/pic/userfile/97129681046.pdfIn PDF document text
    • https://kolegium.inaheart.org/upload/files/xajebanofofo.pdfIn PDF document text
    • https://brillimet.com/uploads/files/202109171523271635.pdfIn PDF document text
    • https://theloneranger.tv/clients/loneranger/ckfinder/userfiles/files/zulutaz.pdfIn PDF document text
    • http://aaronandanthony.com/userfiles/files/41365924978.pdfIn PDF document text
    • http://studiolaviano.it/userfiles/files/17269725063.pdfIn PDF document text
    • https://sipare.com.ar/wp-content/plugins/super-forms/uploads/php/files/jic391afn5nktr9lqkqh33vb75/7035419445.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000aff6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAFF6 10176 bytes
SHA-256: 331da982f7016eaa308fd0b5b9ef8e2065c656169e1cdb8c1f27452d75d22705
font_01_sfnt_off0000c6cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6CF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000dee1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEE1 16076 bytes
SHA-256: 57925406ca8f11b54f7db7eb2aec77c2dcc978582bc9c70c51d1a76e3e099414

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