Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc3090dba06ef2fe…

MALICIOUS

PDF

92.5 KB Created: 2021-07-16 14:28:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 7ced59d530ae0b4645d0190a235aa72d SHA-1: cb88afc6445989b54962171932f60996a6dd8ed4 SHA-256: cc3090dba06ef2fec7d16d059e4d25d8fce6cc1eff1ea8449f71a75d30c4a8eb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as malicious by ClamAV and an ML classifier, and exhibits characteristics of a phishing lure. It contains numerous links pointing to compromised WordPress sites and disposable hosting, suggesting an attempt to redirect users to malicious or phishing pages. The PDF structure and embedded URLs indicate a likely spearphishing attachment campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9935

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
  • 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 https://synerhu.ru/uplcv?utm_term=types+of+distributed+systems PDF link annotation
    • https://puntoagricoltura.it/file/debazivosefipozamer.pdfIn PDF document text
    • https://joyfool.art/wp-content/plugins/super-forms/uploads/php/files/02ae7d5287d2c9066d8fd9f948b0caf6/zejozizolobizevevofetamo.pdfIn PDF document text
    • https://wurstfargo.com/wp-content/plugins/super-forms/uploads/php/files/965d8181d298006a450a96666ac41381/31598975487.pdfIn PDF document text
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cafb631185---80216384973.pdfIn PDF document text
    • https://bistakalikotenetwork.com/userfiles/file/66310109732.pdfIn PDF document text
    • https://colakcivi.com/userfiles/file/59732639251.pdfIn PDF document text
    • https://www.ideaklinik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160d8622c02bec---26765373739.pdfIn PDF document text
    • http://ugyvednok.hu/userfiles/file/1812410130.pdfIn PDF document text
    • http://notariocprietoa.com/notaria/documentos/files/komeromasajadelemiboduj.pdfIn PDF document text
    • http://alpha-th.com/userfiles/file/52974224962.pdfIn PDF document text
    • https://www.mnspineandsport.com/wp-content/plugins/super-forms/uploads/php/files/fe7eda8144f7a06473ec712a1164d5f9/wezofezupufagi.pdfIn PDF document text
    • http://philippinesroadshow.com/wp-content/plugins/super-forms/uploads/php/files/d020df6876b4962bcb7e02d5d739a0c2/xuzixekovuji.pdfIn PDF document text
    • http://www.kzhep.in.ua/wp-content/plugins/super-forms/uploads/php/files/ujkuhdtq82n7asrssquepk2144/tesifuxota.pdfIn PDF document text
    • https://www.varishastalari.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d316a61a7c---92120844135.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/160d74e91971b4---26791191504.pdfIn PDF document text
    • http://mujuerp.com/uploads/ckeditor/files/20210529085234.pdfIn PDF document text
    • https://mumegram.com/userfiles/file/11009033408.pdfIn PDF document text
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607039a361716---70292813098.pdfIn PDF document text
    • http://sciencevier.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070f1117e8c4---31399868868.pdfIn PDF document text
    • https://www.kbstephens.com/wp-content/plugins/super-forms/uploads/php/files/de4b5ec0fdc7ea8713b2cd6b6dcd5767/69230642964.pdfIn PDF document text
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a56445a831d---gopukanexabete.pdfIn PDF document text
    • http://k-yoga.org/file_upload/spaw_upload/file/20210627151042.pdfIn PDF document text
    • https://prsnashville.com/wp-content/plugins/super-forms/uploads/php/files/237544f32f1b3f53f1bcce32cc5d0d1e/10781809720.pdfIn PDF document text
    • http://pavcargo.ru/wp-content/plugins/super-forms/uploads/php/files/bf880086a24421fd00665898e9c8cad4/rimizemijimasowi.pdfIn PDF document text
    • 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_off0001098d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1098D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001219f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1219F 16596 bytes
SHA-256: e4454800a38a756b96b39c55dfff440ba62fbcd379760b0b873d30de50b825df
font_02_sfnt_off00014ca5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14CA5 10664 bytes
SHA-256: 6c6c2bd9e49f771ab3d4f1158571dc5c6f67d7ec94f9279058bd8213e328f24d

Open this report in the interactive analyzer, or submit your own file for analysis.