Malicious PDF — malware analysis report

Static analysis result for SHA-256 382672027b5c692e…

MALICIOUS

PDF

93.2 KB Created: 2021-07-30 01:15:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 59c0bd270711689bd4d785a8e71415a0 SHA-1: 1c4ae64332151e9c3e9b1354787be1fa2202e959 SHA-256: 382672027b5c692e43a843b2048b8dc24ff6bd4bfec548835da95e833131c41a
156 Risk Score

Malware Insights

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

The sample was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links to compromised WordPress sites and other disposable hosting, suggesting a link farm designed to redirect users to malicious content. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates a pattern of using non-clustered link farms on disposable hosting, further supporting the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9930

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://www.circoloaletrium.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b4317245c52---jalolekiradekivakuli.pdf In PDF document text
    • http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160f90ff7952f8---86685063215.pdfIn PDF document text
    • https://www.aceitedeoliva.com/wp-content/plugins/super-forms/uploads/php/files/dc058ca39e679b8181cdb1014cf98e3c/69260314129.pdfIn PDF document text
    • https://lawweb.info/mycms/admin/userfiles/file/pogomolole.pdfIn PDF document text
    • http://rymwid-training.com/userfiles/file/nolosajavomifid.pdfIn PDF document text
    • http://ud2-140.com/files/kisuwerubiv.pdfIn PDF document text
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607eaa109c32f---malamavute.pdfIn PDF document text
    • http://eia-edu.com/userfiles/file/lapamupovozuvawi.pdfIn PDF document text
    • https://myupfield.link/wp-content/plugins/super-forms/uploads/php/files/1hforeqrdo8nebr4vd21tq11k5/mozanitodabenibafexox.pdfIn PDF document text
    • http://mnogonomerov.ru/uploads/file/40446984021.pdfIn PDF document text
    • https://advantagelic.com/singhania/downloads/file/bopabem.pdfIn PDF document text
    • http://pusancard.com/userData/board/file/82204961634.pdfIn PDF document text
    • https://estidevelopers.com/wp-content/plugins/super-forms/uploads/php/files/ab1537b987f30389bb711ea3da95a885/2414172866.pdfIn PDF document text
    • http://ultraljud.nu/bild/files/fumetadefitomab.pdfIn PDF document text
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073a7ba10d17---virowefagibi.pdfIn PDF document text
    • http://tutek.eu/userfiles/file/gukepegesaduvowelop.pdfIn PDF document text
    • http://brette-animation.com/userfiles/file/jewujunibinidisowewuganeg.pdfIn PDF document text
    • http://terapeutickemasaze.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160807b4903b95---pamirowatutobikunike.pdfIn PDF document text
    • https://fzclicks.com/demo/files/editor/file/pepokozifefamesedupera.pdfIn PDF document text
    • http://influences-vegetales.eu/assets/Image//files/mawegesob.pdfIn PDF document text
    • https://parklanehotel.asia/userfiles/file/1868430399.pdfIn PDF document text
    • http://okmarin.ru/userfiles/file/29050992791.pdfIn PDF document text
    • https://reazfarah.com/ckfinder/userfiles/files/32209167838.pdfIn PDF document text
    • http://richmore.kr/uploadfile/fckeditor/file/bakukizegituwu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=react+native+e-commerce+template+githubPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE06 18116 bytes
SHA-256: d1b875b612dc5b6d8654dad3d03f1c39ad1c1fbe54f63aa603ddf8465ffce309
font_01_sfnt_off00011dca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DCA 11040 bytes
SHA-256: a4ec3ccf22231c0d4c0e6815dd36b5996d97fc8d12b55f22d039165490dde05c
font_02_sfnt_off00013716.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13716 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00014f27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14F27 16164 bytes
SHA-256: fd494554c7a7a2c4488382a78096c535ff133766c7221992be4f6a58596b2467

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