Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2471c6018f76bed…

MALICIOUS

PDF

85.3 KB Created: 2021-09-22 22:45:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 2deea6157fa3e53b10e306c81fcb8f6c SHA-1: b82191d5a8563597a9a4de1d29ba16ad17e0fadb SHA-256: d2471c6018f76bed28b65e76f3ea9d99adaae36ae3aae8f99f036eff4d4fe0c9
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, with numerous embedded URLs pointing to potentially malicious content. The presence of external URIs and the 'disposable link farm' heuristic strongly suggest a phishing or malware distribution attempt, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://xn--eyt274i.com/upload/files/vetigujaga.pdf In PDF document text
    • http://ud2-140.com/files/benadadiri.pdfIn PDF document text
    • http://dorp.pl/userfiles/files/70727485198.pdfIn PDF document text
    • https://verandapattaya.com/userfiles/files/81365158905.pdfIn PDF document text
    • https://www.orthovision-lublin.pl/ckfinder/userfiles/files/mojoz.pdfIn PDF document text
    • http://gurolmumcu.com/userfiles/file/65217912248.pdfIn PDF document text
    • https://valstybestarnyba.com/upckfinder/files/27304378044.pdfIn PDF document text
    • https://autohausnschmidt.de/userfiles/file/bajifabuvibekowebiwu.pdfIn PDF document text
    • http://toyotarent.tw/FileData/ckfinder/files/20210905_3C2D8363074BB511.pdfIn PDF document text
    • http://www.pattyn360.com/upload/forum/files/92585080868.pdfIn PDF document text
    • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a5bdfb51a6---jeridagemifevumakuj.pdfIn PDF document text
    • http://futimisdev.com/userfiles/file/34954875976.pdfIn PDF document text
    • http://cc-loges.com/uploads/file/8082686768.pdfIn PDF document text
    • https://lordoptika.hu/files/files/40480693866.pdfIn PDF document text
    • https://ms01bet.net/contents/files/68533121338.pdfIn PDF document text
    • http://tucholainfo.pl/userfiles/file/49898129106.pdfIn PDF document text
    • https://netron.pt/app/webroot/media/files/tebilofekogidabedan.pdfIn PDF document text
    • https://3drm.bg/uploads/pictures/files/86753520073.pdfIn PDF document text
    • http://tydafa.com/dafa/uploadfiles/20210918165221.pdfIn PDF document text
    • http://balalajka.nu/media/fogozowebinibatokoto.pdfIn PDF document text
    • http://hyunsin.net/userfiles/file/82676465402.pdfIn PDF document text
    • http://parzenica-bialka.pl/userfiles/files/14687494665.pdfIn PDF document text
    • https://salonrewards.ca/images/file/37358896101.pdfIn PDF document text
    • http://trubaopt.ru/content/file/55708480974.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=c2h2+pi+bondsPDF 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_off0000e9fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9FE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010215.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10215 10244 bytes
SHA-256: fed29c028710e8f7796a26944a6d3f9d2075b7948c8a1d1514d67e3e077bf45c
font_02_sfnt_off000118c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118C4 18328 bytes
SHA-256: 4dbe7a01180a55f5cd561b0ce224c7f809e6ff9b594248118d5971cd39d9670f

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