Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5fe94dd8f71c0ce…

MALICIOUS

PDF

78.9 KB Created: 2021-08-21 11:36:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-02
MD5: 3cc30eab75bfd7d71a7ac105173bfbe4 SHA-1: 0b81547ab0225d49c862a5e28fd04aa40ce88555 SHA-256: e5fe94dd8f71c0cea5c7239f7e37f5e0202f1c48254f04ca6823529b53e41269
124 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4208

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://anhuizhkj.com/upload_fck/file/2021-4-29/20210429075922872875.pdf In PDF document text
    • https://toskov-yordanov.com/userfiles/file/gotozokezakolurebemuf.pdfIn PDF document text
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/276293209c891c7ca8be5508bca38b0f/96807858113.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/16099c6f7c1bcc---mitajuderukikawutoluwepi.pdfIn PDF document text
    • http://frickcontrols.com/uploads/files/gepepaza.pdfIn PDF document text
    • http://friluftsgruppen.se/wp-content/plugins/formcraft/file-upload/server/content/files/160aace397e359---gowep.pdfIn PDF document text
    • http://tfh-filter.hu/_user/file/zitig.pdfIn PDF document text
    • https://www.infrascale.com/wp-content/plugins/super-forms/uploads/php/files/0f2bd76f04935602d2d9bb543fa3e310/zizop.pdfIn PDF document text
    • https://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/5c5dd2b3eb06fd2c125fd33fea14b01a/92907802595.pdfIn PDF document text
    • http://taihegas.com/filespath/files/20210808014306.pdfIn PDF document text
    • https://suprizpin.com/calisma2/files/uploads/derabemodesolova.pdfIn PDF document text
    • http://biotop-zamosc.pl/userfiles/file/5108890730.pdfIn PDF document text
    • https://stpetejazz.com/wp-content/plugins/super-forms/uploads/php/files/0t6q0a023v0ncssqpvv2ofa1kh/97675118298.pdfIn PDF document text
    • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/16075896933601---99897170922.pdfIn PDF document text
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609447d921b8a---10294312399.pdfIn PDF document text
    • http://mopron.ru/upload/files/78717093241.pdfIn PDF document text
    • http://lroundup.com/clients/d/d7/d7466da0ad72d96b64793f89c518a0d9/File/71382317514.pdfIn PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160e048107b548---sitojofexowogawexosuti.pdfIn PDF document text
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/16078625616e6e---50967075647.pdfIn PDF document text
    • https://gwynharmon.com/home/gwyn/public_html/ckfinder/userfiles/files/83369117503.pdfIn PDF document text
    • https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075ffe9d421e---15516909615.pdfIn PDF document text
    • http://perfectionistpaintingnj.com/ckfinder/userfiles/files/10025761044.pdfIn PDF document text
    • https://heykidsletscook.info/wp-content/plugins/super-forms/uploads/php/files/31188d6251246b32d13ba2323ee88e37/rukureririz.pdfIn PDF document text
    • http://nhs1966reunion.com/clients/1/1c/1ca8f1639ee69cd7806809ed3bcda9bb/File/33369203332.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=asq+six+sigma+green+belt+sample+questionsPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e3bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3BF 18184 bytes
SHA-256: ba3482ea4e738673a66a44bbd72c35f909d8bde0208d706e39654cc859e42710
font_01_sfnt_off000112ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112AC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1