Malicious PDF — malware analysis report

Static analysis result for SHA-256 975625c9f03f59fa…

MALICIOUS

PDF

81.1 KB Created: 2021-04-06 07:46:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 1ef90049ea67d531adbc1d158c006286 SHA-1: 9273f28bfb24256a443b266938b6c6bf60f38a06 SHA-256: 975625c9f03f59fa75cc2c5df5d8f1fe998fb53370796b85cf05c441ed0a34a2
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://golowaki.ru/award?keyword=carl+jung+aion+pdf+download PDF link annotation
    • https://cdn.sqhk.co/powirafawume/logd1PY/mens_haircuts_2_on_sides_fade.pdfIn PDF document text
    • https://gabavogafev.weebly.com/uploads/1/3/4/0/134000006/4231480.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408483/normal_5fd920f522763.pdfIn PDF document text
    • https://lawagupavuraxap.weebly.com/uploads/1/3/4/6/134616311/parafiraresezumegido.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384037/normal_5fe3fe028efcb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456666/normal_603c8756461af.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417824/normal_5fe7774b191b7.pdfIn PDF document text
    • https://cdn.sqhk.co/jomutepe/ge0iblx/rotajibabonumulekekap.pdfIn PDF document text
    • https://vidimepimexuja.weebly.com/uploads/1/3/4/6/134626803/sevaxumi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tuxalowafokuvo/50292703608.pdfIn PDF document text
    • https://s3.amazonaws.com/golepe/702314515.pdfIn PDF document text
    • https://s3.amazonaws.com/belapawerezuju/what_skills_and_competencies_do_managers_need.pdfIn PDF document text
    • https://s3.amazonaws.com/xamapebonijos/lagu_birdy_wings_acoustic.pdfIn PDF document text
    • https://s3.amazonaws.com/fejatepudopito/68915055846.pdfIn PDF document text
    • https://s3.amazonaws.com/megujobemegor/what_kind_of_literary_device_is_exaggeration.pdfIn PDF document text
    • https://s3.amazonaws.com/faduxodiwo/asus_laptop_x453m_driver.pdfIn PDF document text
    • https://s3.amazonaws.com/lixisariwulo/jason_fung_the_complete_guide_to_fasting.pdfIn PDF document text
    • https://s3.amazonaws.com/saziwijaxodav/lead_like_jesus_book_summary.pdfIn PDF document text
    • https://s3.amazonaws.com/fuvidokibet/jusabewuwoxumivat.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_off000100d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100D5 5104 bytes
SHA-256: 1619acd1a12e3271211bcc7ef74c2fb58b900e24e1be52973f29e944e688ce94
font_01_sfnt_off00011256.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11256 10836 bytes
SHA-256: 3c66b33c76903dead79388ea3756c6221cc3137e16e71c30de7e76c87e459b0e