Malicious PDF — malware analysis report

Static analysis result for SHA-256 94fe3693b3caae86…

MALICIOUS

PDF

79.4 KB Created: 2021-07-03 00:58:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: d0b97053a343a56c7a33352923899cc9 SHA-1: f6386b691647d4d390df49d05b2e3e79b96aa71e SHA-256: 94fe3693b3caae86e3687b332514ebd02024ec008c805bf2d31eebf7be474a47
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to compromised WordPress sites which in turn host further malicious PDF files. The presence of multiple external URIs and link farms suggests an attempt to obscure the ultimate destination and potentially distribute malware or phishing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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 https://feriaesotericadeatocha.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075b135c772f---80762936263.pdf In PDF document text
    • http://teusz.pl/UserFiles/file/sagix.pdfIn PDF document text
    • https://associazionedynamica.it/uploads/file/keput.pdfIn PDF document text
    • https://www.allterra.group/wp-content/plugins/super-forms/uploads/php/files/0c36bdda478fb7fa5975a509cd4512b7/37505062801.pdfIn PDF document text
    • http://gibisch.info/files/files/66773948939.pdfIn PDF document text
    • https://stagerightstaging.com/wp-content/plugins/super-forms/uploads/php/files/247d3a024e37fe212ce6b81ad4d65592/54720434182.pdfIn PDF document text
    • https://www.grandiosa.is/wp-content/plugins/super-forms/uploads/php/files/mnpb5utfje7r5lan27shs5ugt7/wutejojedag.pdfIn PDF document text
    • http://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/160d410c9ae35e---sutomowogidijut.pdfIn PDF document text
    • https://realestateconnect.pro/wp-content/plugins/super-forms/uploads/php/files/os2fqlrcbms8i2nfho4vr0tmj6/vudofijawiwenevipatutona.pdfIn PDF document text
    • http://efrex.cz/files/file/10113997777.pdfIn PDF document text
    • http://www.expertnutritionadvisor.com/wp-content/plugins/formcraft/file-upload/server/content/files/160924ad05f413---34322525060.pdfIn PDF document text
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606f0f6b2712d---94437966784.pdfIn PDF document text
    • http://atdawnwelift.com/userfiles/file/48903224427.pdfIn PDF document text
    • https://www.ideakliniksisli.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070b68d4217c---mutitazozada.pdfIn PDF document text
    • https://www.herewardcarpets.co.uk/wp-content/plugins/super-forms/uploads/php/files/muerep3h6hb346es09g5vc8vh0/14385007304.pdfIn PDF document text
    • https://www.pal-kont.hu/wp-content/plugins/super-forms/uploads/php/files/10a7d1ea5aceb45bd1866d0f801f9bdf/87140131225.pdfIn PDF document text
    • http://www.rkcomdesignservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2b3b6c005e---pimevofuja.pdfIn PDF document text
    • https://mimpishio1bet.com/contents//files/sutovufefav.pdfIn PDF document text
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/1607bf4e00187a---vizolori.pdfIn PDF document text
    • https://revapackers.com/wp-content/plugins/super-forms/uploads/php/files/0diq2mbqnk8h17o58sp7g5p935/gixufewu.pdfIn PDF document text
    • https://sasalidayanisma.org/uploads/file/tikorixuvepunudob.pdfIn PDF document text
    • https://sindonis.com/userfiles/file/4219077466.pdfIn PDF document text
    • https://best-turbos.com/wp-content/plugins/super-forms/uploads/php/files/77eb937c453065f845d7bad266403c1f/79229023912.pdfIn PDF document text
    • https://electrabicycles.pl/app/webroot/uploads/file/16216484114919.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=is+ice+apple+good+for+pregnancyPDF 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_off0000d4a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4A4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ecbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECBB 10760 bytes
SHA-256: bed773b014d29ea4752e364bc6a11ab46542353db8a104adf040ced523367f8e
font_02_sfnt_off00010561.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10561 16652 bytes
SHA-256: 4ffc5431c6d509adb1b1221149722647b3b1c0e767b2f55443f1963e1b575a69

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