Malicious PDF — malware analysis report

Static analysis result for SHA-256 0223b764436b9421…

MALICIOUS

PDF

70.7 KB Created: 2021-09-26 19:21:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 2643490ade91f277bf6b5bf4f46ed645 SHA-1: c64f46e8310f542a0921f34d1d16e19739e7b74b SHA-256: 0223b764436b94215e334934eb48c72930f9ad573921a1746f85ca1171a9f4da
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs, many of which point to disposable domains and are structured as a link farm. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution through these links. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports this, identifying the document as a link farm on disposable hosting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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 http://lammermoor.net/imagenes/file/79409967728.pdf In PDF document text
    • http://mwflower.com/upimagesfile///wogam.pdfIn PDF document text
    • https://cepatdaftargroup2.com/contents/files/50872068906.pdfIn PDF document text
    • http://manhchenang.vn/webroot/img/files/92346881636.pdfIn PDF document text
    • http://bagliodeimille.it/userfiles/files/92402991241.pdfIn PDF document text
    • http://bagumul.com/file_upload/spaw_upload/file/20210907015503.pdfIn PDF document text
    • http://medizator.ru/ckfinder/userfiles/files/lapenatix.pdfIn PDF document text
    • http://commune-bourre.com/userfiles/file/namatote.pdfIn PDF document text
    • http://coeb.eu/userfiles/files/38303139259.pdfIn PDF document text
    • https://sipare.com.ar/wp-content/plugins/super-forms/uploads/php/files/tt1skf9tnfealnfjhja7b9o991/pazubujewaxosa.pdfIn PDF document text
    • http://cambresisemploi.fr/ckfinder/userfiles/files/kesitagokogefudikakop.pdfIn PDF document text
    • https://foodvellythailand.com/upload/files/93831520294.pdfIn PDF document text
    • http://diskacme.dk/images/upload/file/nonemepiliza.pdfIn PDF document text
    • http://automsystem.com/UploadFile/file/20210910231649132.pdfIn PDF document text
    • http://nenorm.com/files/files/xisinat.pdfIn PDF document text
    • http://vanhacollection.com/images/files/benalenuworapup.pdfIn PDF document text
    • http://civicwomen.com/ckfiles/files/20106929231.pdfIn PDF document text
    • https://unitytradefze.com/ckfinder/userfiles/files/jetukuxatid.pdfIn PDF document text
    • http://orvositudasbazis.eu/images/upload/file/xarikobumololojifomu.pdfIn PDF document text
    • http://xn--9w3b270a7kf.kr/data/editor/file/dijuw.pdfIn PDF document text
    • http://webinaris.net/ckfinder/userfiles/publics/files/wapise.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=a+quiet+place+2+stream+free+onlinePDF link annotation
    • 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_off0000b06b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB06B 17008 bytes
SHA-256: 7ba444fe8e8f7d073bf931df4faebcbbfa8b3b280127bb9017dd8e7f55f94c49
font_01_sfnt_off0000db26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB26 10988 bytes
SHA-256: 88870b6945d30fa90360c4dc7adc48026fee1c6c734367ca5bc44ff1fd806409
font_02_sfnt_off0000f4bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4BD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.