Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce7f504c327a730e…

MALICIOUS

PDF

363.8 KB Created: 2021-07-01 16:10:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: dfc97707c1b1aaf3acb1dd24480945d1 SHA-1: cc0c0cb7b0633a4fc290de67c3ce0537d37d469e SHA-256: ce7f504c327a730e6e4f21d1c6ff72adc3a1602cf7182d389e650a358c76e711
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to potentially malicious websites, as indicated by the 'PDF_SEO_UTM_REDIRECTOR_LINK' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' heuristics. The ML classifier and ClamAV detection further support its malicious nature. The primary attack pattern involves luring users to compromised or malicious domains, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8654

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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.
  • 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://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608569d372b9e---kivadaxarowanimepag.pdf In PDF document text
    • http://lookkorea.net/userfiles/file/bitulazuxif.pdfIn PDF document text
    • http://namngonviet.com/user-/files/23679624996.pdfIn PDF document text
    • http://apexhealthnutrition.com/newerac2c/userfiles/file/88207199854.pdfIn PDF document text
    • https://ateneoarbonaida.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608433e79f76d---13101001852.pdfIn PDF document text
    • http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c3e860ac48---44663230159.pdfIn PDF document text
    • http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a276abbc71d---60676936654.pdfIn PDF document text
    • https://aldurra.ly/images-editeur/img/file/85051114628.pdfIn PDF document text
    • http://dynamic1984.com/user_file/file/gedenedilokapi.pdfIn PDF document text
    • https://diversifiedhumansolutions.com/wp-content/plugins/super-forms/uploads/php/files/1bb8ee1cf352190f19211948f9939de2/mizitepifejuxawimivala.pdfIn PDF document text
    • http://rotang.net/userfiles/file/nikevuzolaz.pdfIn PDF document text
    • http://kursadowicz.pl/Upload/file/pezidubemefurumifulu.pdfIn PDF document text
    • https://heritagelogs.com/wp-content/plugins/super-forms/uploads/php/files/lk8hehpbigqdr833d0d1700gb0/ranifipujosulezorok.pdfIn PDF document text
    • https://sgotomotiv.org/upload/files/diroki.pdfIn PDF document text
    • https://wpsqld.com.au/wp-content/plugins/super-forms/uploads/php/files/76a1d8a6f2e18ac5f90e615108a4384c/36222588426.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/2aec92c299afe72f5eb81742347307b2/ruzamuradulilutar.pdfIn PDF document text
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/1606cec997735f---87297692858.pdfIn PDF document text
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16080aab468ec5---51784076695.pdfIn PDF document text
    • http://www.marcelasemper.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f7f611fcda---48284509330.pdfIn PDF document text
    • https://www.hospedeagora.com.br/wp-content/plugins/super-forms/uploads/php/files/h03h88h3sg5n51vlj4absneho1/fotozetipafav.pdfIn PDF document text
    • https://www.syah.org/wp-content/plugins/super-forms/uploads/php/files/dc7ade06bb2db6b16d8fca5c6586d804/jigebamagajipixevawe.pdfIn PDF document text
    • http://gwardiajuvenia.pl/zdjecia/fck/file/52083925022.pdfIn PDF document text
    • http://aksaxena.com/bpms/includes/fckeditor_uploads/userfiles/file/34920383874.pdfIn PDF document text
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607304066c3be---30608460315.pdfIn PDF document text
    • http://tootooair.com/FileData/ckfinder/files/20210618_AD074446EE8C15EE.pdfIn PDF document text
    • http://amfmeg.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca550e6d92---41194231100.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=how+to+stop+worrying+about+your+partner+cheatingPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0005259a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5259A 16544 bytes
SHA-256: 66b7945b99a9c78025a9a0ace4161995b24b08b80ea391fd428eddc3553bac27
font_01_sfnt_off00053c59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x53C59 18624 bytes
SHA-256: 6cf8d98b343196306c212a0c24a6123111006237c0c2a3ee5f09353a83226370
font_02_sfnt_off00056d7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x56D7B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00058592.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x58592 11036 bytes
SHA-256: 59c11bdea26ccab561680fb1f53434541d76e334ab5c62db88a58f238348f152