Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba30b90a4261f6fb…

MALICIOUS

PDF

89.6 KB Created: 2021-07-24 14:12:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: a9cd2383a313c47b098f16aeadbe4936 SHA-1: da282e7e5dce3faa965d2e8d69ac545b5ecdea24 SHA-256: ba30b90a4261f6fb6aa22d1c44cf3e07b93c97a8e686318446dc21af2762448f
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It functions as a link farm, with numerous URLs pointing to various websites, including those hosted on compromised CMS platforms. The primary purpose appears to be directing users to potentially malicious content or phishing sites through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9702

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://schodylux.pl/userfiles/file/15672999409.pdf In PDF document text
    • http://beijingxinzhi.com/userfiles/file/20210506173327_1232510278.pdfIn PDF document text
    • https://malashealthcare.com/userfiles/files/18270637175.pdfIn PDF document text
    • http://themultifold.com/wp-content/plugins/super-forms/uploads/php/files/ajl97sjlhmq358o0brii58h493/82304944029.pdfIn PDF document text
    • https://abhimaninteriors.com/ckfinder/userfiles/files/77330608495.pdfIn PDF document text
    • https://cytairtool.com/test/userfiles/file/20210722_6c1b9.pdfIn PDF document text
    • http://wisdomtours.net/upload/file/38934227182.pdfIn PDF document text
    • https://keluargamimpi2.com/contents//files/kalizamuwekuno.pdfIn PDF document text
    • https://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/3b500d5d781fc25912b4857e03569ef4/28779154447.pdfIn PDF document text
    • http://www.buildingmalawi.com/images/uploaded/documents/pamizabebu.pdfIn PDF document text
    • https://numen-wow.com/userfiles/cloud//files/35088649936.pdfIn PDF document text
    • https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080c581187b5---pipudotovu.pdfIn PDF document text
    • https://murten-hotel.ch/userfiles/files/dumifaduganu.pdfIn PDF document text
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d3e5fedbf3---rilolesebafoduzopem.pdfIn PDF document text
    • https://kolodezrus.ru/wp-content/plugins/super-forms/uploads/php/files/f7bda4c2eaebfec1a88c7bb5ce0530a6/60293105678.pdfIn PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/1c594a2143cb03c41fa2b1a9d86db2da/kazakavovar.pdfIn PDF document text
    • http://nothingelsematters.net/pharma/images/files/manirove.pdfIn PDF document text
    • https://growmytruck.com/wp-content/plugins/super-forms/uploads/php/files/ceb2e07b9f812bef7dd318b7b221ccad/zibofikikobedax.pdfIn PDF document text
    • http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160a43048a6e2f---xovagamilemimewiv.pdfIn PDF document text
    • http://penoplex24.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609c93452e559---7442142895.pdfIn PDF document text
    • https://christembassybarking.org/wp-content/plugins/super-forms/uploads/php/files/04033523939447bd033bac3c92413586/redasopawujato.pdfIn PDF document text
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b12148b2188---dimivixulaburuxow.pdfIn PDF document text
    • http://raduzhniy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b33c31249d7---45073397230.pdfIn PDF document text
    • https://www.medicalart.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1607e1f1918645---pofugezogagobofetuxelevet.pdfIn PDF document text
    • https://lavaecucebrescia.it/file/zubuleremolezata.pdfIn PDF document text
    • http://mariopresto.pl/userfiles/file/46050242626.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=seloc+repair+manual+1301PDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000da2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA2B 17612 bytes
SHA-256: f017ff73e0176328db8ca802890bf9e6c69584ced237e20172566948eb535b6a
font_01_sfnt_off00010892.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10892 16252 bytes
SHA-256: 15510956be7ead9f824e209a6104b8be563ded270a313a9f6e525002084f8b58
font_02_sfnt_off00011e7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E7A 10788 bytes
SHA-256: db8a59f630c34d1988979171ed6628ab509813424442aa0ce638596d8b20cab4
font_03_sfnt_off0001373a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1373A 1720 bytes
SHA-256: 9c3c50ca7885eb1b87261f6f74ba185aca171ae216209544253fbc3ee3acc073
font_04_sfnt_off00013f60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F60 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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