Malicious PDF — malware analysis report

Static analysis result for SHA-256 1afc0696a4a3bbb4…

MALICIOUS

PDF

69.4 KB Created: 2021-05-10 01:27:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7de091f64833d1f1213f1ebede7e974e SHA-1: 00bc3c82971db864ca83f1e6886568cafab75936 SHA-256: 1afc0696a4a3bbb4b43f6c9e30aca4e9910cdf82e7c2fdc7847222aab9d5b894
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics indicate it functions as a link farm, directing users to multiple compromised WordPress upload locations. The document body, though heavily obfuscated, suggests a lure related to a 'Gibraltar weather report', likely a pretext for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9827

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 http://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160841ab657403---vokikego.pdf
    • http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160763e6e2da56---13217499735.pdf
    • http://vankouwenenmastop.nl/UserFiles/file/suwunuwonivob.pdf
    • https://heykidsletscook.info/wp-content/plugins/super-forms/uploads/php/files/5f112ff67939f688d66daf0d7148930a/pexub.pdf
    • https://www.infratechgroep.nl/wp-content/plugins/super-forms/uploads/php/files/dc1d4f22b062f7f89f31667cfdec6ba4/vituxaladoxomifijuli.pdf
    • https://amesmedicalservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e0864dc44f---nosewofafaketikolujoson.pdf
    • https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/b127248f1bbacf29980dc6f6a9033136/9573144289.pdf
    • https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160985e54d6d68---74173228754.pdf
    • https://hotelristorantenovecento.it/wp-content/plugins/super-forms/uploads/php/files/a77487baaf0a3f9d69f5edce1177b0a7/mokujebirorageruse.pdf
    • https://www.isgs.org/wp-content/plugins/super-forms/uploads/php/files/1a0f29868b0df0071174844d376d0681/70616957748.pdf
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/1c35835ff3f12f0933e0a6d24bcc5222/75905411604.pdf
    • https://useoneconvo.com/wp-content/plugins/super-forms/uploads/php/files/3240552dacc5848557be6906cf93083b/kukituw.pdf
    • http://itaindustrial.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16079d365041fe---fekizaxotativo.pdf
    • https://www.hintonassociates.com/wp-content/plugins/super-forms/uploads/php/files/730f818ce9e39e3e35c18460d7331f34/84296478466.pdf
    • https://movesforfree.com/wp-content/plugins/super-forms/uploads/php/files/39al30mks9e94c3n79uthuoqn0/80011570882.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=gibraltar+weather+report
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dce6.bin
e9ea1d47c8267379a0db33b6b251e25ccd39e25dc6da1f2bd913255a16a87330		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDCE6 4992 bytes
font_01_sfnt_off0000ede6.bin
3e7244c7cd36cc7ca2e30093d177a3c00ee39cd17d8884bb85c772c6dcd322f0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEDE6 9956 bytes

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