Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3d2d48c37e1dcea…

MALICIOUS

PDF

97.1 KB Created: 2021-08-19 09:58:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 8f656a6fa769b783ac6c1f2745c1de81 SHA-1: c7aaa038df2c24e9d65c820dffaa799f4dbaeb87 SHA-256: f3d2d48c37e1dcea8d00f77e7afc92a06fc6c8e6f287d972d75e91cb54e9cdef
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The sample is a PDF file flagged by ML classifiers and ClamAV as malicious. It contains numerous links to compromised WordPress upload storage and disposable hosting sites, indicating a phishing or malware distribution attempt. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic suggests the document is a link farm designed to manipulate search results or direct users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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://sung1.com/upload/files/79655777259.pdf In PDF document text
    • https://benchmarktransitions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160720ecd4e20e---zukiri.pdfIn PDF document text
    • http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c415c76af7---bikemamutubivex.pdfIn PDF document text
    • http://artstudiodesign.it/userfiles/files/76455126476.pdfIn PDF document text
    • https://ivanamihic.com//files/kewipuxiv.pdfIn PDF document text
    • http://amandamaitland.com/images/file/zebodomowositekosizejaz.pdfIn PDF document text
    • http://dintainoodle.com/uploads/files/376554040.pdfIn PDF document text
    • https://senzedigicraft.com/wp-content/plugins/super-forms/uploads/php/files/a8a2ddd606c3d84c8cb064819c192629/gesuzifexefoxemizupejawik.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/6ca4557272e030185fd462ed5cf6969d/24212700785.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/160783390f2c41---46468123050.pdfIn PDF document text
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfa05eecd94---rekonupo.pdfIn PDF document text
    • https://albawadiroad.com/userfiles/files/relex.pdfIn PDF document text
    • http://brette-animation.com/userfiles/file/99348395036.pdfIn PDF document text
    • http://objetivovender.com/wp-content/plugins/formcraft/file-upload/server/content/files/16103aeb76417c---10320554697.pdfIn PDF document text
    • http://vizit-k.net/uploads/editor/files/57789331023.pdfIn PDF document text
    • https://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a27969598d3---melupesigowujusefozivoxa.pdfIn PDF document text
    • https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/bpbp6mh25iibf107lopb8bcqdk/mobadenojitoforajokix.pdfIn PDF document text
    • https://beaufortbond.com/wp-content/plugins/super-forms/uploads/php/files/6b2df84cd3ab0b21d297363c1fdaecf2/zudupepaboguwe.pdfIn PDF document text
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160bd0ddf09a12---duranukabokijotelasu.pdfIn PDF document text
    • http://www.gunyagder.org.tr/wp-content/plugins/super-forms/uploads/php/files/60jitbfkd07hj2u37lflm306r0/zibesofobepekuwa.pdfIn PDF document text
    • http://dirabrealtors.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092129ac05b9---75949040208.pdfIn PDF document text
    • http://manpukulivermore.com/uploads/files/kapifekebubozivid.pdfIn PDF document text
    • https://too.kg/wp-content/plugins/super-forms/uploads/php/files/5541ea51e299e8d897910df3803fda64/wuzikupomikukuberinaz.pdfIn PDF document text
    • http://boisehighclassof1965.com/clients/879780/File/murotosimetowunelajelun.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=dmf+role+in+acid+chloride+formationPDF 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_off00011516.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11516 18684 bytes
SHA-256: e6a47609b7efaf90b7923cd8eb26158289fb87ae1e6173fbfd312aa463ccb1b6
font_01_sfnt_off00014607.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14607 10576 bytes
SHA-256: 4f19706247e0c3476117029b651893c8d581a8a560b7414e827c66edfaaa57d8
font_02_sfnt_off00015ddf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15DDF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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