Malicious PDF — malware analysis report

Static analysis result for SHA-256 212267bfe5d02239…

MALICIOUS

PDF

71.2 KB Created: 2021-06-02 13:48:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 85f7bd5090ece970c21b9f11c5c7c09d SHA-1: b0f1df60e4d25c744f64f14337cb320742139bed SHA-256: 212267bfe5d02239794ff89991a11bece9f4073a41fa8ba2bfaf4f6f8d7d8789
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one pointing to a link farm on 'huntic.ru' that appears to be a lure for phishing or malware. The 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic and the high number of distinct hosts and links suggest a malicious intent to redirect users. While no scripts were explicitly extracted, the nature of the embedded URLs and the ML/ClamAV detections indicate a malicious phishing or trojan delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://huntic.ru/pbw?utm_term=plantillas+para+balance+general+en+excel+gratis PDF link annotation
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://savavaze.pbworks.com/w/file/fetch/144472062/pesejuviga.pdfIn PDF document text
    • http://zigunef.pbworks.com/f/38985264932.pdfIn PDF document text
    • http://jiboduxoguv.pbworks.com/f/tlcharger_gratuit_pour_rparer_une_cl_usb_endommage.pdfIn PDF document text
    • http://pamotekegopa.pbworks.com/w/file/fetch/144438018/download_gta_sa_v_1.08_apk__obb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/931f09f0-bef0-4ee0-98d2-cdab64085e16/zaroka.pdfIn PDF document text
    • http://xujefix.pbworks.com/w/file/fetch/144417213/mowovufubepepar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e4b4a361-7365-4069-adc2-7128fc611e3b/how_to_open_black_and_decker_drill_bit.pdfIn PDF document text
    • http://mifimoruzuwo.pbworks.com/f/betagovodakonorivi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ca8175c-d023-4949-b5d8-f616c946b9f9/25981610365.pdfIn PDF document text
    • http://xesimisejek.pbworks.com/f/bengali_old_movie_download_website.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/646adeb9-4ea1-4053-b23b-51492337af6f/computer_science_distilled_book_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1326beb0-c130-453e-9764-a43067c442a0/how_to_get_medical_certificate_for_leave.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6fe33889-fa80-40f4-a37e-1aa0002add87/9135360722.pdfIn PDF document text
    • http://rixepal.pbworks.com/f/70693936546.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c312f2e-d1e3-4b66-a8cd-e49bc3378bbf/fowewokozilawuw.pdfIn PDF document text
    • http://tasonupopam.pbworks.com/f/78274430846.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af0fd0af-62d1-4758-a9e6-9866091372b2/piwomelojikuzo.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d8b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8B3 5308 bytes
SHA-256: 51afe08f79a43e171bcc71826d8505d9d01d40ffef3b94759fa5f7825a44092e
font_01_sfnt_off0000ead6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAD6 11136 bytes
SHA-256: e38453c1e071ebb98a0a5f919d4126c08ca25d13254cdaf45213a89bf6e8cfae

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