Malicious PDF — malware analysis report

Static analysis result for SHA-256 0416493e978834d5…

MALICIOUS

PDF

84.2 KB Created: 2021-07-01 13:13:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 47ef5c65ee892fbddefec2b31ba61a02 SHA-1: 3784bd94f100364e0b2582d7f12d5aa68061d553 SHA-256: 0416493e978834d5ca3dd44b34db264bcf5c0e72f7dec285401040a15e553740
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs, many pointing to compromised CMS upload directories, suggesting a link farm designed to redirect users to malicious content. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates a non-clustered link farm on disposable hosting, further supporting a phishing or malware distribution scheme. No scripts were extracted, but the overall structure and URL patterns are indicative of a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 6

  • 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
  • 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://www.realisthotel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a34b366b27c---ruzoporutigila.pdf
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/16099e13ce581c---zifesukigovebuteba.pdf
    • https://roadtoring.com/wp-content/plugins/super-forms/uploads/php/files/2370f34b7565243185d1d3ca0e457a14/44604627734.pdf
    • https://infrastone.com/userfiles/files/43820004517.pdf
    • http://www.supercarrentalsofmiami.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609024032a59a---nubobese.pdf
    • https://too.kg/wp-content/plugins/super-forms/uploads/php/files/61d2f56ab3b4e4cb727ec6d6a787d21a/sitejarosinetufedizag.pdf
    • http://apexhealthnutrition.com/newerac2c/userfiles/file/zuvukudani.pdf
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160c88efde6d66---99613160052.pdf
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/d7kvjv3o9kp0u6mkurkk8ckio6/42490479406.pdf
    • http://www.alexgis.com/siteuploads/editorimg/file/gevataxof.pdf
    • http://bajajsports.com/userfiles/file/55914055308.pdf
    • https://technok.cz/wp-content/plugins/super-forms/uploads/php/files/cc4a4a9bce78fdd02cdc038ad546c9d8/tidabakufoxaka.pdf
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a4c03a967aa---bafoge.pdf
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/fd61c4a5817cb57d5d9d6dba61a68c57/resodakovikizoto.pdf
    • https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609834da7d0d1---13776867454.pdf
    • http://qytbearing.com/upfile/file/48501190963.pdf
    • http://dush-kz.ru/uploads/fck/file/zafikafelixow.pdf
    • https://agenciaboom.com/wp-content/plugins/super-forms/uploads/php/files/n6kvm6ke0enpd7suqd301hvol7/xadatubozufegedinonazafuw.pdf
    • https://xistenze.com/files/files/gulurasetin.pdf
    • https://sweetestspaparty.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c390cf382ef---95179372539.pdf
    • http://yaeram.com/userData/board/file/dufimofor.pdf
    • http://stylist.in.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160dc3e97c2367---mimul.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=traditional+ppt+templates
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e826.bin
afde748496330a29da7fc1fc781b74633e6ad9870f95bd7a828c259f26ece0d8
pdf-font-stream PDF embedded font (sfnt) at offset 0xE826 10516 bytes
font_01_sfnt_off00010006.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10006 16792 bytes
font_02_sfnt_off00011818.bin
8bcac5754ad7dcd169045b990612dc121125107095f9e3576e1f4592c07808a7
pdf-font-stream PDF embedded font (sfnt) at offset 0x11818 16228 bytes