Malicious PDF — malware analysis report

Static analysis result for SHA-256 62272289146c2048…

MALICIOUS

PDF

90.5 KB Created: 2021-09-21 20:18:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: a48b00a9e0ad01ebb99be6eae34385f1 SHA-1: 8f7d415143404ea530dcfe3e757d3baf14cc6b19 SHA-256: 62272289146c20481bda51446b00b375fc26ad768f3a41322b7604d7c031537a
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by ClamAV as a phishing trojan and a machine learning classifier indicated a high probability of maliciousness. The PDF contains numerous embedded URLs, many of which are hosted on suspicious domains and appear to be part of a link farm designed to redirect users. The presence of these links suggests an attempt to lure victims to malicious sites for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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 http://khiensa.com/UserFiles/File/21200511751.pdf In PDF document text
    • http://buzmakov-ua.ru/admin/ckfinder/userfiles/files/5458570967.pdfIn PDF document text
    • http://bangtaisay.com/uploads/userfiles/file/jujulo.pdfIn PDF document text
    • http://agama-rc.com/upload/files/gudokefawovolopirora.pdfIn PDF document text
    • http://dh-life.com/ckfinder/userfiles/files/3099098332.pdfIn PDF document text
    • http://ediljolli.com/userfiles/files/rabali.pdfIn PDF document text
    • http://pujcovnanaradi-tvarozna.cz/userfiles/files/96325704429.pdfIn PDF document text
    • http://rosniyom.com/userfiles/files/totupogemikefabunamoger.pdfIn PDF document text
    • http://website-design-company.in/dev3/damodar/ckfinder/core/connector/php/userfiles/files/kivunanaga.pdfIn PDF document text
    • https://kozmetikadunakeszi.hu/userfiles/file/66626917502.pdfIn PDF document text
    • https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/161432c840cce6---41911476277.pdfIn PDF document text
    • http://xn----8sbfeahwarn6ac1adp3fb2p.xn--p1ai/userfiles/file/xewidaludipuk.pdfIn PDF document text
    • https://northwestconvention.cz/data/files/83056898620.pdfIn PDF document text
    • http://akifkasaboglu.com/esatfisek/images_upload/files/15897010633.pdfIn PDF document text
    • https://tedvandergulik.nl/userimages/file/75916893262.pdfIn PDF document text
    • https://www.terraton.com.my/ckfinder/userfiles/files/nawudaxatojazorukoranad.pdfIn PDF document text
    • http://mtecommerce.it/public/news/file/91790452708.pdfIn PDF document text
    • https://aznamaste.com/ckfinder/userfiles/files/32234739697.pdfIn PDF document text
    • http://bolt.fo/public_html/userfiles/files/48649440920.pdfIn PDF document text
    • https://quangcaowebsitecomvn.xemlaco.com/uploads/files/ximalabozukodosewar.pdfIn PDF document text
    • http://digitalqwerty.com/ckfinder/userfiles/files/22216047878.pdfIn PDF document text
    • http://studiotecnicopinto.it/userfiles/files/zasugekajalakapugotudoro.pdfIn PDF document text
    • https://turdv.ru/SITE/files/editor/file/56603606823.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=scaricare+ultima+versione+androidPDF 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_off0000fbef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBEF 10772 bytes
SHA-256: 30b84b7d20ef5eb32299ee1e391111942268598770282953d58953d963f1fa2c
font_01_sfnt_off000114b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114B6 18144 bytes
SHA-256: 2581f24a4c2d73bb162e0be4cdb0a18e99e0aaf877c7118890e2da02e2ab1b80
font_02_sfnt_off00014495.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14495 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1