Malicious PDF — malware analysis report

Static analysis result for SHA-256 f17d20e68f2b2808…

MALICIOUS

PDF

73.9 KB Created: 2021-09-19 17:56:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: af9b81d56ff09f877ccb0e798bbe66e4 SHA-1: c2bc1584ea0a7c00da30c45976e5b0ed79a1a41b SHA-256: f17d20e68f2b2808f5c602406d51f0231d2d5c9639d2c6f13434043257a8bb0d
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs, many of which point to compromised WordPress sites and disposable hosting, indicating a link farm designed to distribute malicious content. ClamAV detected this file as a phishing trojan. While no scripts were directly extracted, the structure and URL patterns suggest an attempt to redirect users to malicious sites, likely as part of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3768

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://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/16146aa78b265d---pufede.pdf In PDF document text
    • https://bharatbiodiesel.com/userfiles/file/mefoxoligitoravewakimum.pdfIn PDF document text
    • https://chambredhotes-savoie.com/ckfinder/userfiles/files/nigozekufeboma.pdfIn PDF document text
    • http://electric-kernbichler.at/suditaborom.pdfIn PDF document text
    • http://pure-chiral.com/upload/files/60213739856.pdfIn PDF document text
    • http://c2mag.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d02f473c1c---vafadologa.pdfIn PDF document text
    • https://bluza-shop.ru/content/File/peduwitazegotedakibav.pdfIn PDF document text
    • http://canadanur.com/resimler/files/luzapawizejezimametebus.pdfIn PDF document text
    • http://adabaskimerkezi.com/upload/file/87286926345.pdfIn PDF document text
    • https://unitedfightalliance.jordanadams.com/ckfinder/userfiles/files/82630127138.pdfIn PDF document text
    • http://rbtyutj01.com/userfiles/files/jirugonekuvedoxirone.pdfIn PDF document text
    • http://secureyun.cn/uploadfile/file///2021091905311327.pdfIn PDF document text
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1613ce6eeb4c67---7813218449.pdfIn PDF document text
    • http://aguito.madteam.net/ckfinder/userfiles/files/dinofujifutusoledawef.pdfIn PDF document text
    • http://nbc.com.vn/ckfinder/userfiles/files/80725962725.pdfIn PDF document text
    • http://dataction.org/demo/dataction/media/belunezixaxovunogabowasid.pdfIn PDF document text
    • http://veterinariacomportamentale.it/userfiles/files/93472281238.pdfIn PDF document text
    • http://footstepfloor.com/upfiles/files/nekap.pdfIn PDF document text
    • http://manuale.aziendasulweb.it/userfiles/files/dopegerutu.pdfIn PDF document text
    • http://caythuocdangian.net/images/files/50411968201.pdfIn PDF document text
    • https://takiminsahada.com/wp-content/plugins/super-forms/uploads/php/files/ugo8u5nujtgntgjjb2i869s54q/28418404141.pdfIn PDF document text
    • http://tunapvietnam.thietbiotoviet.com/Images_upload/files/68081219689.pdfIn PDF document text
    • http://lighthouse-connection.at/myPix/file/8055933553.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=schaum%27s+outline+of+lagrangian+dynamics+pdfPDF link annotation
    • 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_off0000c5a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5A0 11392 bytes
SHA-256: c96cac912f65d3710b8966aa06d580f30cb422c6f0d47284199c6b3438c9a94d
font_01_sfnt_off0000e020.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE020 19092 bytes
SHA-256: ee014143a7be81f6289fe704f1cc6ad531bd0a6425f5628bf4b8ee8e58937b0f
font_02_sfnt_off0001126c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1126C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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