Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f797a8940da52d8…

MALICIOUS

PDF

81.8 KB Created: 2021-08-06 23:05:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-07
MD5: 7b40da1840d95635844b1f1b0b6bd6cb SHA-1: 1a6f59fbcb4f85d51f21786b0ab67fe54ac70316 SHA-256: 0f797a8940da52d8a3772fa79d4bfd3041811ac52c047dcc2bbfd0a997e2d27c
154 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and ClamAV as malicious, indicating a phishing or malware distribution attempt. It contains a link farm pointing to numerous domains, some of which appear to be compromised or disposable, suggesting an effort to obscure the ultimate destination. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9007

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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
  • 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://folientastaturen.pl/_data/file/85825914502.pdf In PDF document text
    • http://sladkiy-ostrov.ru/userfiles/files/74363153691.pdfIn PDF document text
    • http://119hero.kr/userData/board/file/rotufirit.pdfIn PDF document text
    • https://activepymes.com/pub/file/kakejomitobugaxi.pdfIn PDF document text
    • http://doks-films.com/pcms/content/file/87997287572.pdfIn PDF document text
    • https://member-amz-seller-system.de/wp-content/plugins/super-forms/uploads/php/files/9a0daa16fe7ffbb82663aa5a0a610e1f/momonagatomikivegavan.pdfIn PDF document text
    • https://economiadecomunion.net/ckfinder/userfiles/files/tizos.pdfIn PDF document text
    • http://xn--80aaffebba2apgigwiiececnggk9e4k.xn--p1ai/pict/file/rirunalowugoterekebunava.pdfIn PDF document text
    • http://brmhn.com/userfiles/file/20210605114421_pk0iwv.pdfIn PDF document text
    • http://gemwishrs.com/ckfinder/stones/files/repadosekovodirex.pdfIn PDF document text
    • http://vidol.nl/userfiles/file/biriwanidapux.pdfIn PDF document text
    • http://www.veronicaneal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/16107bef0bfdd9---95860429584.pdfIn PDF document text
    • https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d91bf2f9db---tonufixagi.pdfIn PDF document text
    • http://rfychina.com/upfiles/files/16248503846218.pdfIn PDF document text
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160f188b9b4820---salixubulaneketipal.pdfIn PDF document text
    • https://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/b28c106513b6dd22f29a06dcaf3b731b/66931694353.pdfIn PDF document text
    • http://limobebe.com/userfiles/files/nipaxozupelod.pdfIn PDF document text
    • https://istihdamhaberleri.com/upload/ckfinder/files/guraw.pdfIn PDF document text
    • http://insidethedigitaltrend.biz/userfiles/file/depamiruganeruvego.pdfIn PDF document text
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087d7ec65c5b---9503496752.pdfIn PDF document text
    • http://poexali.org/static/image/_u/system/files/30705967510.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/160dec8bac3938---47203832958.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=minecraft+ben+10+omnitrix+mod+1.12+2PDF link annotation
    • https://sharpspringwww.kinsta.cloud/wp-content/plugins/super-forms/uploads/php/files/8a4d79c3f25c906cf55fbbaf649ae5c1/4292181877.pdfIn 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_off0000dfc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFC8 11020 bytes
SHA-256: 81b699fcd61e24af8c97db220b244542977bc7b48888da15d6caee153b12c78f
font_01_sfnt_off0000f978.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF978 17992 bytes
SHA-256: c25e9c4899512fa561c1e312913afdf6d30ff03ae00a520e00440c08ddc7bc51
font_02_sfnt_off000128e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128E3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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