Malicious PDF — malware analysis report

Static analysis result for SHA-256 a02505589993511f…

MALICIOUS

PDF

82.5 KB Created: 2021-09-12 21:25:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 1cebd63b66b1b3317b1168782051638e SHA-1: 41d7bc440b59eec860f6c1e55e8a05fa4cf134a1 SHA-256: a02505589993511fb6d5fe300df9e16f0e9808190271cdc1f4f446383aa46971
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many pointing to suspicious domains, and is flagged by ClamAV as a phishing trojan. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a high volume of links on disposable hosting, suggesting a malicious intent to manipulate search results or distribute further content. While no scripts were explicitly extracted, the nature of the PDF and its embedded links strongly suggests it's part of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://sakesushilakehavasu.com/uploads/files/nujupage.pdf In PDF document text
    • http://maryalo.com/userData/board/file/92189513003.pdfIn PDF document text
    • http://baldonimarcostudio.eu/userfiles/files/91408694282.pdfIn PDF document text
    • https://copperscraphandlers.com/ckfinder/userfiles/files/refaperasejadovuluwavep.pdfIn PDF document text
    • http://savvyais.com/userfiles/file/wuluzaxadodedi.pdfIn PDF document text
    • http://appextskihjthj.handysociality.com/upload/files/sesujunivobusakuno.pdfIn PDF document text
    • http://fermobkorea.com/userfiles/file/20210903142145.pdfIn PDF document text
    • http://yotlist.com/uniformkontakt/userfiles/image/files/bamebejuw.pdfIn PDF document text
    • http://alpinedelhi.com/userfiles/files/81004194762.pdfIn PDF document text
    • http://litho-and-co.fr/ckeditor/upload/files/12597075841.pdfIn PDF document text
    • http://automotiveenergy.cz/userfiles/file/defokilavumazig.pdfIn PDF document text
    • http://pvvc.cz/files/gevulodokudorazokemedef.pdfIn PDF document text
    • http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/161307db14916c---pufig.pdfIn PDF document text
    • http://cochemical.com/upload/files/65552822404.pdfIn PDF document text
    • http://chothuexeninhbinh.net/data/dulieu/files/fanukifaronuzoxokigafor.pdfIn PDF document text
    • http://gtlitalia.com/userfiles/files/rupisesosuzupizigir.pdfIn PDF document text
    • https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139a1930fd05---kolameta.pdfIn PDF document text
    • https://s-h.cc/uploads/files/202109100433171833.pdfIn PDF document text
    • https://universitecentrale.net/uploads/FCK_files/file/jorozowo.pdfIn PDF document text
    • https://agrocare.ro/ckfinder/userfiles/files/39277319803.pdfIn PDF document text
    • https://wilsonbarrera.com/inicio/wp-content/plugins/formcraft/file-upload/server/content/files/16134a63492d18---54815615809.pdfIn PDF document text
    • https://cahayaapi1.com/contents/files/24644087853.pdfIn PDF document text
    • http://somkuthyoptika.hu/editor_up/ralodenonidujaxajebujir.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=bolts+map+examplePDF 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_off0000df77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF77 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f78e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF78E 10272 bytes
SHA-256: f974614ccb4932d1ff1be65433aaee4e6959bf04a0c6737022c33e914eb13135
font_02_sfnt_off00010ecf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10ECF 17676 bytes
SHA-256: e17dca98b7362b17133f5542ee8fed050d98d33bdf5b46742577dd0e5aa8ac5c

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