Malicious PDF — malware analysis report

Static analysis result for SHA-256 d98fe629420f627f…

MALICIOUS

PDF

89.9 KB Created: 2021-07-03 20:00:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5c092e42268877124fb568cb94a7417a SHA-1: 82e26a40211dd447b41484cb78a19e2499e13fab SHA-256: d98fe629420f627f2b4b33719e99ae4881e2f2c1c98f2c27fb0cfa040b72283e
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics reveal it functions as a link farm, directing users to multiple compromised CMS upload locations. These locations host further PDF files, suggesting a multi-stage attack or distribution chain designed to obscure the ultimate payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://ophtalmic-overnight.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1606f047340c7f---vuwedabosemiragisu.pdf
    • http://studiopassarotti.it/userfiles/files/69426231328.pdf
    • http://susasoft.com/upload/userfiles/files/xegubu.pdf
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d13c55bcab---5029850981.pdf
    • https://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/1imode6mbpadcle00rq950ii91/nivumijununoxukob.pdf
    • https://108pizza.pl/uploads/userfiles/files/xagifubexulovofarobin.pdf
    • https://geneolock.com/locktactyuma/userfiles/file/92173336490.pdf
    • http://www.rkcomdesignservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c6fb5cf030---panuz.pdf
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/094566719f8a0dcbc9aaab0206f6651e/90058281009.pdf
    • https://gccpay.net/wp-content/plugins/super-forms/uploads/php/files/da2d954c9f2825cd957f5a044cf8f236/86757437816.pdf
    • http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cd3953ec0e---kalanudovizolaj.pdf
    • http://roughriders66.com/clients/f/fa/fa96273273f04fd2a06feef12b1e4d70/File/838910504.pdf
    • https://daaeportrett.no/upload/file/73865226792.pdf
    • http://villaturri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ceeee7c987---49757819050.pdf
    • https://ethiquedevelopers.com/wp-content/plugins/super-forms/uploads/php/files/a84df5d531ff2d6992b1896b540afa0d/jobirumuligolanojukopa.pdf
    • https://www.movingwithmagna.com/wp-content/plugins/super-forms/uploads/php/files/4f78ab12108575c488b06ac10a3e79c2/pinovagigepopulumubanale.pdf
    • http://silesiacapital.eu/data/file/57040654583.pdf
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c0f997898c---zexubatulimot.pdf
    • https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/b250506707c3b00cf4e7e92784ff5c5a/5016903433.pdf
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/umurpsofnc9hpeg23r5hunudj6/vojeboza.pdf
    • https://purefeeling8.com/data/file/65005908195.pdf
    • http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b132464265c---42383655762.pdf
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a93392ad5c0---bozekexevisojiza.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=the+moon+yes+or+no+tarot
    • https://sharpspringwww.kinsta.cloud/wp-content/plugins/super-forms/uploads/php/files/d3ed5f582b99d18f6098e0cfe3cb14ad/rodepogabevajal.pdf
    • 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_off0000fe61.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFE61 16792 bytes
font_01_sfnt_off00011678.bin
458f01dd32fe8698085426d29bd515baa9d54be499a08c4ada1b3d58952f937d
pdf-font-stream PDF embedded font (sfnt) at offset 0x11678 10312 bytes
font_02_sfnt_off00012d95.bin
d2a574ab5fe76dd752ed02686f8b1aeb78cc466dfdddbb6af043d2c4801032a3
pdf-font-stream PDF embedded font (sfnt) at offset 0x12D95 17360 bytes