Malicious PDF — malware analysis report

Static analysis result for SHA-256 9269a6935fe8e2a0…

MALICIOUS

PDF

80.7 KB Created: 2021-09-14 14:15:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: ad9408e7e5e7c415f45b3df7c9cb7640 SHA-1: 76b450399ee3ff97748fa4c2aae4c31f921a575c SHA-256: 9269a6935fe8e2a0e3123b8b6d628fd20ac0e0183c3415993097edd4f61031d6
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, with the heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically identifying it as a link farm on disposable hosting, suggesting a phishing or malware distribution scheme. The presence of many unknown reputation URLs further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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 http://siamsankyo.com/Uploads/file/vibokomivakolilisogakad.pdf In PDF document text
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/161322f077797c---bexotunujen.pdfIn PDF document text
    • http://www.armstrongre.com/files/files/pukigowoz.pdfIn PDF document text
    • http://form4concrete.ru/pics/cont/file/62986605634.pdfIn PDF document text
    • https://gegeny.hu/uploads/file/44957417689.pdfIn PDF document text
    • http://xn----7sbqwxdbhblh2h.xn--p1ai/data/file/43909739479.pdfIn PDF document text
    • https://franchise-vietnam.com/app/webroot/img/files/nenoxaralewemujuselator.pdfIn PDF document text
    • http://rjbmachinery.com/d/files/kazoxuvezazopewegajax.pdfIn PDF document text
    • http://mextro.de/upload/files/jiwivuvirizoj.pdfIn PDF document text
    • http://www.hangmandigital.com/files/file/14508465719.pdfIn PDF document text
    • https://tractorpulling-emmeloord.nl/upload/file/depodoruf.pdfIn PDF document text
    • http://adbrf.com/files/fckeditor/file/10560561461395f264c6a5.pdfIn PDF document text
    • https://cargotavio.ru/files/file/rawimufu.pdfIn PDF document text
    • http://www.pilartangguh.com/file/3380062854.pdfIn PDF document text
    • http://sziszolg.hu/editor_up/dewadubaxulopegap.pdfIn PDF document text
    • http://centonze-vini.com/userfiles/files/30357620476.pdfIn PDF document text
    • http://tuanayapim.com/rsm/files/mulig.pdfIn PDF document text
    • http://gonzagafood.com/userfiles/files/vuxumefozeva.pdfIn PDF document text
    • http://daydreamspin.com/userfiles/file/77036146147.pdfIn PDF document text
    • https://obermeyer-modemarkt.de/upload/file/50112420201.pdfIn PDF document text
    • https://mclandpin.com/calisma2/files/uploads/99316411743.pdfIn PDF document text
    • https://goodnest.info/tctt/sites/aaa/file/voluvemojodo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=redmi+6a+softwarePDF 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_off0000d4f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4F6 10664 bytes
SHA-256: e0c238324ff26c794bf37980714635bae1643999d80ed9c7dba5a4ffb8f1240f
font_01_sfnt_off0000ed8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED8B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001059d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1059D 18184 bytes
SHA-256: 6f3017dfc0fca3e1d70325d3d1dc876b80b9ee080331761829d01e2d3c8fdb0c

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