Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a981032832e8e5d…

MALICIOUS

PDF

78.6 KB Created: 2021-07-08 14:29:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: d6441118a68d690e03408f001196123c SHA-1: dcf9b472f8d87d9d38269760e19acf6076c3fe0c SHA-256: 7a981032832e8e5d1c80ebbf5b896cf062f3ad4f9ef1ef91ffb2b6b334315ea8
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous embedded URLs pointing to compromised WordPress sites and other domains, likely serving as a distribution point for phishing or malware. The presence of multiple links on potentially compromised infrastructure suggests an attempt to obscure the ultimate malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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://www.duffylighting.com/wp-content/plugins/super-forms/uploads/php/files/4001a9e72a4de19d753ffea0de115a7e/7639492329.pdf In PDF document text
    • https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160bc614dde5f6---pizawusadepaxaluwop.pdfIn PDF document text
    • http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/160aa345f463e9---89715152860.pdfIn PDF document text
    • https://whiteplacard.com/UserFiles/file/83444970879.pdfIn PDF document text
    • https://mszukam.pl/dat//file/kenipu.pdfIn PDF document text
    • http://pnmanagementsolutions.in/uploads/vezuzubaxidit.pdfIn PDF document text
    • http://atek-ent.com/upload/file/lilukin.pdfIn PDF document text
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/1608da33810dfb---gekawekowa.pdfIn PDF document text
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af2c13307cb---93004955386.pdfIn PDF document text
    • http://hersheyhigh1981.com/clients/37302/File/wuzisowokomirexaxevifoz.pdfIn PDF document text
    • http://garmagostaran.com/Upload/file/2407501134.pdfIn PDF document text
    • http://gennarimaq.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bfcba19e03c---wiroxibiwufasifuxa.pdfIn PDF document text
    • http://ddrwc.net/clients/869849/File/41713209246.pdfIn PDF document text
    • http://axiomestates.com/userfiles/file/tavenakidafokoj.pdfIn PDF document text
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cca8267b0e---xuxupuwabupusanipixe.pdfIn PDF document text
    • http://kamkmori.cz/ckfinder/userfiles/files/62903989733.pdfIn PDF document text
    • https://asiahijau.com/contents//files/27889367240.pdfIn PDF document text
    • https://almoheetmanpower.com/public_html/userfiles/file/bijuziza.pdfIn PDF document text
    • http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0836431392---meguturofatitanuje.pdfIn PDF document text
    • http://nhactheducthammy.com/upload/files/tefojuvuvivufe.pdfIn PDF document text
    • https://savitravel.ro/ckfinder/userfiles/files/31184178173.pdfIn PDF document text
    • https://nmg.lv/img/uploads/files/37047093377.pdfIn PDF document text
    • https://wegofa.com/userfiles/file/71089479684.pdfIn PDF document text
    • https://ceilford.org/wp-content/plugins/super-forms/uploads/php/files/101634aad9247fa97f3df56eb0530e8d/24621392116.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=parallelogram+worksheet+answersPDF 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_off0000d002.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD002 10644 bytes
SHA-256: b3f223aa4c7bab07f7fe9a154db84cf4e50d74f5b598cae97119b3cbcf7bcc4d
font_01_sfnt_off0000e852.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE852 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010064.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10064 17140 bytes
SHA-256: b9982b508fd302f158c01b313bc3c8f2e0658ce5e9fce7754aa88e8718e82ba4

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