Malicious PDF — malware analysis report

Static analysis result for SHA-256 c47cf6019cc79ef4…

MALICIOUS

PDF

73.7 KB Created: 2021-07-09 11:34:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 904f8a70b30cd2e4543f1703d5a2f792 SHA-1: 4c52ea56e42e0519909f79bdef224cc1e58b05c5 SHA-256: c47cf6019cc79ef4e4bebad6d499d0f64cb976bef41494028f4cc9b42a81491a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many pointing to compromised CMS uploads or disposable hosting, suggesting an attempt to redirect users to malicious sites. The presence of external URIs and link farms indicates a likely phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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://runo34.ru/attachments/file/rozedanuxatekupavoweza.pdf
    • http://celcg.pl/uploaded/file/losilejofenuni.pdf
    • http://svazekobciorlice.cz/userfiles/file/ririb.pdf
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac428f44e3b---39792041515.pdf
    • http://studioarchterreni.it/userfiles/files/matodagepazogenabejopug.pdf
    • https://weblative.com/wp-content/plugins/super-forms/uploads/php/files/ntr50j6p6egavh63uld19b0f02/vomim.pdf
    • http://amirafouad.com/uploaded_files/file/32586547359.pdf
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e4dd3294e4---60784455602.pdf
    • https://dongytueduc.com/wp-content/plugins/super-forms/uploads/php/files/3r00a4b5acup1lmo1deeig9na6/kemojiwixen.pdf
    • http://project-lovcen.me/userfiles/file/61600078630.pdf
    • http://josephlillianmorrisfamily.com/clients/59960/File/33937380571.pdf
    • https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/160a0f29cd00cd---dabuwijepewexudasowasud.pdf
    • https://wcdt.co.th/wp-content/plugins/super-forms/uploads/php/files/a7broubvfm3toggfaob0kcaqeu/bodekujupon.pdf
    • http://amirafouad.com/uploaded_files/file/guxuwagofadovoketalezeto.pdf
    • http://wanyuantemple.tw/userfiles/file/pakujitifuka.pdf
    • http://www.esthemed.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160c44b8f7f5fb---34571775237.pdf
    • http://alemotta.com/resources/original/file/labuxuxorozirisu.pdf
    • http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/160b807189ccfd---dagujeronovigom.pdf
    • http://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160cc19e1b9aaf---31851558532.pdf
    • https://traonguoc.vn/wp-content/plugins/super-forms/uploads/php/files/kv1bqeoub2ecalpgpb25uemf8q/kebibesagiju.pdf
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160b7a91ea8f85---madaxoniradeteledufojup.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=watch+the+girls+guide+to+depravity
    • 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_off0000bb76.bin
c55fb0962ddfddfc58598b7ff6f47d9990f06ede8b3570b01732955c4bc88c0b
pdf-font-stream PDF embedded font (sfnt) at offset 0xBB76 10960 bytes
font_01_sfnt_off0000d4e5.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xD4E5 16792 bytes
font_02_sfnt_off0000ecf7.bin
2e4069c0039e4b3cefa48e9fbc178e5ddb51c8ccb0af78b4ff1296e2759c065e
pdf-font-stream PDF embedded font (sfnt) at offset 0xECF7 16880 bytes