Malicious PDF — malware analysis report

Static analysis result for SHA-256 bba7b058b6fea046…

MALICIOUS

PDF

110.9 KB Created: 2021-09-21 21:01:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 2fb98e729d251694e5838ca696755d60 SHA-1: 523526567468c91e4d12365ea306484889500df5 SHA-256: bba7b058b6fea046d696de20d5cb67885bc1c19c8a2e057523c498913885a88d
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple external URIs pointing to disposable domains, with one specifically mentioning a Minecraft download lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://smidgel.ru/uplcv?utm_term=download+minecraft+story+mode+episode+2+android PDF link annotation
    • http://sweatrinserepeat.com/ckfinder/userfiles/files/linejometegu.pdfIn PDF document text
    • https://thibiditrading.com/public/userupload/files/bewojovonotevodatabat.pdfIn PDF document text
    • http://www.expo-hotel.com/english/wp-content/plugins/formcraft/file-upload/server/content/files/1614320f5c6b51---42924202087.pdfIn PDF document text
    • https://xn--interpeas-r6a.es/upload/files/zukuzuvepebak.pdfIn PDF document text
    • https://blugarden.eu/file/62488706948.pdfIn PDF document text
    • https://www.bussmann-tiefbau.de/ckfinder/userfiles/files/sekabiduwedevovolutenodus.pdfIn PDF document text
    • http://radio-salsa.fr/php/rs/filesupload/file/kusuja.pdfIn PDF document text
    • http://pepinieres-soupe.com/userfiles/file/nexenugeloniwox.pdfIn PDF document text
    • http://klwas.org/userfiles/images/file/wesedosuk.pdfIn PDF document text
    • https://hv2barrier.com/application/third_party/ckfinder/userfiles/files/12518885263.pdfIn PDF document text
    • http://www.dkmodels.net/ckfinder/userfiles/files/jasenopidis.pdfIn PDF document text
    • https://cantarefides.ro/admin/userfiles/file/4616985835.pdfIn PDF document text
    • https://mingyi-lock.com/data/file/userfiles/files/pulot.pdfIn PDF document text
    • http://lactopad.com/uploads/files/towopuritul.pdfIn PDF document text
    • http://hzjksj.com/images/upload/File/kepuxuvalujosejaxepo.pdfIn PDF document text
    • http://solarexperte.ch/fckeditor/editor/images/file/nafunug.pdfIn PDF document text
    • http://kp-technik.cz/ckfinder/userfiles/files/bubiwuwur.pdfIn PDF document text
    • https://global-brand.net/userfiles/files/83687456165.pdfIn PDF document text
    • https://www.tessilgiada.it/wp-content/plugins/formcraft/file-upload/server/content/files/1612eb7baa0334---tujisilager.pdfIn PDF document text
    • http://kajo-frings.de/userfiles/file/93470553884.pdfIn PDF document text
    • https://ahha.az/userfiles/file/gixutej.pdfIn PDF document text
    • http://hometextiles-consultant.com/ckfinder/userfiles/files/87363496266.pdfIn PDF document text
    • http://madurastones.com/userfiles/file/80041153144.pdfIn PDF document text
    • http://sor1310.com/userfiles/file/97009308020.pdfIn PDF document text
    • 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_off0001494e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1494E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00016160.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16160 18920 bytes
SHA-256: 7346b6083a90e9f6fecbe4c48a15d4598b59df65dd743ce48f43865153bf354b
font_02_sfnt_off00019312.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19312 11104 bytes
SHA-256: 0040b0af638be5741d955ca51106237c31e653f1d78902929fb71ab856131f23