Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffe0ac4c529323a5…

MALICIOUS

PDF

84.9 KB Created: 2021-06-26 05:43:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0ddbfefdb0106c38feabb1dfa127028a SHA-1: 0b4122b6dceb6df2971f4e2623f08f7bf00ab4c9 SHA-256: ffe0ac4c529323a5b12d9b61f418f6b103a6c900a22ef21bf04f7f874acddf21
156 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which point to compromised WordPress sites. The ML classifier and ClamAV heuristic strongly indicate maliciousness, likely for phishing or malware distribution purposes. The document body is heavily obfuscated and unreadable, providing no direct content clues.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://crmloccitanecr.com/campannas/file/mesazidabevusaxekif.pdf
    • http://rolmech-strzelno.pl/Upload/file/ruxupemunujel.pdf
    • https://tkpmission.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607de0bc69b70---geluxakuv.pdf
    • https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/a50de0996e6be0f32953c42fe7064b6a/vukexuratefufase.pdf
    • https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cdf0e47d29---84336857385.pdf
    • https://cristiandellavedova.com/wp-content/plugins/super-forms/uploads/php/files/evaj26v60if1h8f6nvk2fha6v3/xoguzibigigididejizidafaz.pdf
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/faa66f6abf197ca8f7b042e60f79e2d1/62096052568.pdf
    • http://castanienfamily.com/clients/74558/File/33469459186.pdf
    • https://isleo.com/i_photos/file/75486812901.pdf
    • http://www.k-24.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083bbf5e5cf9---kozaratarewawizomofagaru.pdf
    • https://almoheetmanpower.com/public_html/userfiles/file/mubovixefidepiko.pdf
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/3f861be63b340fc405d953cd69fde788/pobabokurutej.pdf
    • http://vyveva.eu/UserFiles/File/72327270054.pdf
    • http://bjzjygj.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/sijewomavekarakigulix.pdf
    • https://bentzendesign.se/wp-content/plugins/formcraft/file-upload/server/content/files/1609b9081a4831---jemeko.pdf
    • http://email-database.info/userfiles/file/31220099837.pdf
    • https://globalclassic.org/wp-content/plugins/super-forms/uploads/php/files/l8og61ers241fubdh0fs97jnh4/komaxadoma.pdf
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084e21c77120---dozologi.pdf
    • https://torrentclub.vip/wp-content/plugins/super-forms/uploads/php/files/vm744rg78vqolp4ioi6t79opik/39834642327.pdf
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a4fa31029d6---66077671138.pdf
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5144658a55---75216379405.pdf
    • http://c2ctrading.org/cms_upload/files/67240957105.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=cg+police+physical+test+details+pdf+2020
    • 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_off0000e5b5.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE5B5 16792 bytes
font_01_sfnt_off0000fdc7.bin
1574f41b1724932018029baaf6e9d33e7f1ee900c2fd0d3845f0440aa648af90
pdf-font-stream PDF embedded font (sfnt) at offset 0xFDC7 17200 bytes
font_02_sfnt_off00012a97.bin
515d3b10ba8a67bcd67a097ca6d8f0e8af7db5ca9bcd8a7b946713ef40ad0e92
pdf-font-stream PDF embedded font (sfnt) at offset 0x12A97 11080 bytes