Malicious PDF — malware analysis report

Static analysis result for SHA-256 3283cdbfdbbee25e…

MALICIOUS

PDF

81.8 KB Created: 2021-03-29 22:04:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: f3a2a8a16752fce817073ca3050b5bb7 SHA-1: fafa33bcf6523cb8c5d08d49ee6d5adf691b6e08 SHA-256: 3283cdbfdbbee25e258795f8d64a67449cbf03bb23d80cd923a77cc36630a76c
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to suspicious domains and are flagged as part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to phishing or malware-hosting sites. The document body, though heavily obfuscated, appears to be a lure for educational content, aiming to trick users into clicking the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9852

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
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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://jottigo.ru/award?keyword=binomial+theorem+ncert+solution+class+11+pdf PDF link annotation
    • http://marketeuro.pro/monster_girl_doctor_episodes_14nxrj.pdfIn PDF document text
    • https://cdn.sqhk.co/kuzetuzame/9Eierhd/qr_scanner_free_download_for_android.pdfIn PDF document text
    • http://de-bewertung-id2842384.icu/757261695788wmjs.pdfIn PDF document text
    • http://dimozakebaba.scienceontheweb.net/43222994366.pdfIn PDF document text
    • http://milky-rp.space/penthouse_magazine_free_downloadq2xct.pdfIn PDF document text
    • http://idealicaitalia-official.site/67405694280cmnrn.pdfIn PDF document text
    • https://cdn.sqhk.co/kukisigafumi/hiihvng/business_international_degree.pdfIn PDF document text
    • http://gebevojika.mygamesonline.org/data_communication_and_networking_ppt_forouzan.pdfIn PDF document text
    • http://rozujed.sportsontheweb.net/cbd_hemp_oil_101.pdfIn PDF document text
    • https://cdn.sqhk.co/pajokiman/glhggrb/rumble_movie_trailer.pdfIn PDF document text
    • http://patedeziw.mypressonline.com/25472592308.pdfIn PDF document text
    • http://vazewuxu.mywebcommunity.org/wizot.pdfIn PDF document text
    • https://cdn.sqhk.co/ruwonumatag/Ym8hfgc/iihf_world_hockey_championship_jerseys.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://s3.amazonaws.com/tetofamuxulil/ubuntu_disk_image_for_virtualbox.pdfIn PDF document text
    • https://2e907eb7-0cdb-46e5-a4de-ff0e34d1b96e.filesusr.com/ugd/7ea2c5_4f306dc5b1a64984a174686821436a64.pdf?index=trueIn PDF document text
    • https://07e0a16e-b77d-475b-b724-88bbaedb347c.filesusr.com/ugd/8e9e2f_dcd23efef66d4e208fea0b32c5af0145.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wanalovum/sezipotofutewidobiluz.pdfIn PDF document text
    • http://gudugapapilile.atwebpages.com/dawixu.pdfIn PDF document text
    • http://desigaweru.myartsonline.com/29523673196.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eba3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBA3 5496 bytes
SHA-256: 7515aac27314dde34bdb1a8785b20441dcfa112f1638bc019d2c98bdb30a736a
font_01_sfnt_off0000fe28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE28 10680 bytes
SHA-256: 226757bd3bcec1ee963a6d8cda0a70f3be573e6f85383bcb5535aa9192ba3292
font_02_sfnt_off000122e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122E2 16096 bytes
SHA-256: 3a87a2a80cb0740ff7ad33dbd9b35031d90241dfccc5ab96a3d2c3133af9c3ca
font_03_sfnt_off000137e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137E8 3172 bytes
SHA-256: 144bd5903697fade5e4acb2a874f2ae188603f04374cce871fb814db105462b0

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