Malicious PDF — malware analysis report

Static analysis result for SHA-256 3028dc898aa12be1…

MALICIOUS

PDF

86.1 KB Created: 2021-07-26 12:14:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: b23953db96e75cc7bff55c5c30872cd2 SHA-1: 4155107f33cf81139aa003a52b49d68974a8d503 SHA-256: 3028dc898aa12be1ddd5d47d59c1c03fc406158ee196757bbacbab6872d0e146
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to websites hosted on compromised CMS platforms, suggesting a phishing or malicious redirection scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://istanbulballoons.com/ckfinder/userfiles/files/lusumegosavolepogobafali.pdf In PDF document text
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c52006cceed---49937307226.pdfIn PDF document text
    • https://www.growxponential.com/wp-content/plugins/super-forms/uploads/php/files/snflr1689a5mqir2ro4es2riea/xigikulokageserowawiravu.pdfIn PDF document text
    • http://avonsteel.com/UserFiles/file/bikotafifagifunaj.pdfIn PDF document text
    • http://kochamsushi.pl/UserFiles/file/lumemojaz.pdfIn PDF document text
    • https://grupo-bahia-real-estate.com/ckfinder/userfiles/files/tinovobowumazonugofukavu.pdfIn PDF document text
    • https://robinio.de/wp-content/plugins/super-forms/uploads/php/files/7f2q4pg79svj9nvnahqeus9es2/gejikoxujemisopavi.pdfIn PDF document text
    • http://sme1970reunion.com/clients/7/78/786f1e38e9ed540b4a7d4f5dbcc09398/File/41594717689.pdfIn PDF document text
    • https://pjkconstruction.ca/images/file/texusokimizega.pdfIn PDF document text
    • http://ck-tct.ru/userfiles/file/lovidunolatizexemutunir.pdfIn PDF document text
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cf7d2ec428d---xinipopiduwidekezujo.pdfIn PDF document text
    • https://www.bocamvigliesrooms.com/wp-content/plugins/super-forms/uploads/php/files/d1da335aff1ff945752f1631b826ecd2/bozizepikokes.pdfIn PDF document text
    • https://genesislighting.net/wp-content/plugins/super-forms/uploads/php/files/cd46dd2064fbbc4be3a7ccdac92a2ba1/46705260907.pdfIn PDF document text
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609436c2e2c16---99568925393.pdfIn PDF document text
    • http://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609428bb75790---8833743916.pdfIn PDF document text
    • http://tlumacz-lipno.pl/pdrzewiecki/files/22214101671.pdfIn PDF document text
    • http://snypes.nl/img/customer//files/vegilebujezemo.pdfIn PDF document text
    • https://donnasalon.ru/wp-content/plugins/super-forms/uploads/php/files/153b585350be09ee1ea24fb663699fb1/petugotikuviv.pdfIn PDF document text
    • http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/160966ed98100e---kamero.pdfIn PDF document text
    • http://hyperasp.net/userfiles/file/26963930864.pdfIn PDF document text
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/05c5d6b8e50e6187f48c7ad52522d0fa/rukuludapoxowiferowelepad.pdfIn PDF document text
    • https://rybczewice.pl/userfiles/file/38796774915.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=goldoni+base+20+sn+manualPDF 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_off0000ec63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC63 18112 bytes
SHA-256: e8af6a04a7e01b7ec46413341d68aa00567eb2ea65881b8a2c22420bbe66cffb
font_01_sfnt_off00011a66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A66 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001327d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1327D 10732 bytes
SHA-256: d62daa48e0ac1bc51981fdc23f1281c0be2385e4da42e142bd3562d01060a277

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