Malicious PDF — malware analysis report

Static analysis result for SHA-256 017e6e953fe70250…

MALICIOUS

PDF

80.2 KB Created: 2021-09-05 16:51:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 17f838d701483ad816ad82bb823c85a8 SHA-1: e55ac421e5944738c6aa338dc01b4be4fb80c46e SHA-256: 017e6e953fe702508f24556552c48a317f721893040c960712a874bcf406961b
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a link farm pointing to multiple compromised WordPress upload directories and other domains, likely serving as a lure for users to download further malicious content. The document's structure and embedded links suggest an attempt to disguise malicious URLs as legitimate files, aligning with phishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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 https://betonwerkendejonge.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c34875a90aa---jofurapolixafipaperen.pdf In PDF document text
    • http://ibiforstarlight.org/clients/3/3c/3cfcca4e360ca8807b7dd7d6e7cbeae0/File/29525689402.pdfIn PDF document text
    • http://scandirent-new.ru/uploads/assets/file/85296158403.pdfIn PDF document text
    • http://brmhn.com/userfiles/file/20210602053804_cd7ahk.pdfIn PDF document text
    • http://www.mondzorgvesa-voorschoten.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a78098b3693---59956592538.pdfIn PDF document text
    • http://peaceinsrilanka.lk/userfiles/file/48651725144.pdfIn PDF document text
    • http://quinta.cl/upload/files/xudidibiwanemidupi.pdfIn PDF document text
    • http://xn--e42bt3l.net/upfile/files/bodamulodatevaba.pdfIn PDF document text
    • http://datev.hu/ckfinder/userfiles/files/33695997962.pdfIn PDF document text
    • https://donnasalon.ru/wp-content/plugins/super-forms/uploads/php/files/c84258144267fd6dfb5f5507b632db9e/vokevudujatafuvapubon.pdfIn PDF document text
    • http://chatyzvule.cz/uploads/35390131775.pdfIn PDF document text
    • https://btegypt.com/file/51297512819.pdfIn PDF document text
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a71ca83d4f4---guvonig.pdfIn PDF document text
    • https://vegan-eshop.cz/data/file/79044570367.pdfIn PDF document text
    • https://yourlightingbrand.com/wp-content/plugins/super-forms/uploads/php/files/0a15cbab5da8692d4451a9f1115c2a14/57032429714.pdfIn PDF document text
    • http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1612742a2803ec---xunalab.pdfIn PDF document text
    • http://morgancountyoh.com/userimages/69487040009.pdfIn PDF document text
    • https://ystechpro.com/nbloom/fckuploads/file/kuxomopa.pdfIn PDF document text
    • https://theshairpodcast.com/wp-content/plugins/super-forms/uploads/php/files/8f5deabdef4e7a80a852f018e2faa6d4/pobabidapovuxavigamanevi.pdfIn PDF document text
    • https://yssnewlessons.org/UserFilesTwo/file/jivapadopexikoxanuka.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/6is56gr9boqm5fr131o1j42oe5/70328185685.pdfIn PDF document text
    • https://e-lightingcontrols.com/wp-content/plugins/super-forms/uploads/php/files/d332172b8869aec48cc6a9ca3f2834b6/72255782587.pdfIn PDF document text
    • http://ijdssymposium.eu/upload/gewekaxuke.pdfIn PDF document text
    • http://massageindex.nl/images/uploads/laxip.pdfIn PDF document text
    • http://ccsup.co.th/uploads/ckfinder/files/gereleditil.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=manual+del+drone+mavic+proPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d38d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD38D 10568 bytes
SHA-256: 8ab3b14a4f886b2607fa65c88560defaaed94f6515e8819eda37934c8a296b38
font_01_sfnt_off0000eb8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB8F 18272 bytes
SHA-256: 750b57680ef5e2e72a876a949f56caf85845aabbaf6385b9baa14c42fa7e7104
font_02_sfnt_off00011b0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B0A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1