Malicious PDF — malware analysis report

Static analysis result for SHA-256 059d405b909c79be…

MALICIOUS

PDF

86.5 KB Created: 2021-09-14 12:45:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 2ba098b549f868f4afcbf51171d4c079 SHA-1: 6525cd2644d9115ef823bd38cb0153387c01ec68 SHA-256: 059d405b909c79bebfa696ea19977d89e8adecb0cd3e2f6463c9d05b16d08aef
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file is a PDF document identified as malicious by ML classifiers and ClamAV. It contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of these URLs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://pixomot.ru/uplcv?utm_term=read+injustice+year+5 PDF link annotation
    • http://foxgraphics.paulsfashion.in/files/ralojamoleboziduve.pdfIn PDF document text
    • http://abwlargo.com/uploads/files/xepipufoje.pdfIn PDF document text
    • https://indiansabroad.uk/userfiles/file/75133086822.pdfIn PDF document text
    • http://ephtour.com/FileData/ckfinder/files/20210910_280034B58D282418.pdfIn PDF document text
    • http://www.pattyn360.com/upload/forum/files/25068047130.pdfIn PDF document text
    • https://testgit.begurholidays.com/uploads/userfiles/files/sefejoxe.pdfIn PDF document text
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/161310eefa77c7---bitowo.pdfIn PDF document text
    • http://shanghaiqingchen.com/upload/files/69982990928.pdfIn PDF document text
    • http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/9db86f8a82f2d37a05a3fcf298f246d8/sodaliloxakagowono.pdfIn PDF document text
    • http://lasantitosrestaurant.com/userfiles/file/76436576378.pdfIn PDF document text
    • http://websteravelandscaping.com/editorData/file/28192384019.pdfIn PDF document text
    • http://12shio5.com/contents/files/faropatiraxonomuj.pdfIn PDF document text
    • https://dienhoanghean.com/upload/ck/files/xiripaselukekujapaje.pdfIn PDF document text
    • http://verzorgingsindex.nl/images/uploads/paxufewipigumudusutit.pdfIn PDF document text
    • http://issaproject.com/app/views/panel/ckfinder/userfiles/files/41510842126.pdfIn PDF document text
    • http://ageddfjtjgrade.pretty-match.com/upload/files/71889971416.pdfIn PDF document text
    • http://coytex.net/ckfinder/userfiles/files/zisevatemosafadabilulolak.pdfIn PDF document text
    • http://glovimex.com/uploads/ckfinder/files/tivedanaworokosibipadi.pdfIn PDF document text
    • http://belovosushi.ru/files/2783429266.pdfIn PDF document text
    • http://nhatrangpalace.vn/app/webroot/upload/files/27624347892.pdfIn PDF document text
    • http://keletunderground.hu/images/uploaded_pics/file/63441107906.pdfIn PDF document text
    • https://hijaulumut.com/contents/files/durum.pdfIn PDF document text
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f4326513c8---wazobatarame.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_off0000eb14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB14 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010326.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10326 18604 bytes
SHA-256: 33ef528df7d4c1f8135a193bffa92b461fe7e3f1ba2aeef45c05a94fdb23f349
font_02_sfnt_off0001336d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1336D 10720 bytes
SHA-256: 8bc7cf26326bbc2f82685327d98553d1a481db87204bc435fb69bd1a0f17ee2f