Malicious PDF — malware analysis report

Static analysis result for SHA-256 f74ccd5b05d2f589…

MALICIOUS

PDF

78.8 KB Created: 2021-02-24 18:23:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: b98250abe28e6b2e5ab6083c58d50adf SHA-1: ed8b2653272871cd0444fd876daf78bc49e9826a SHA-256: f74ccd5b05d2f589d4089e4cab050603ae09157e0ea0ce74cce5c3bff1f22513
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to redirector infrastructure or link farms, indicating a phishing or scam attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are characteristic of phishing lures designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/123?utm_term=how+to+read+index+funds In PDF document text
    • https://kapebuzuzevasa.weebly.com/uploads/1/3/4/5/134587117/ec097f65a.pdfIn PDF document text
    • http://reawolt.online/3147481251716kvz.pdfIn PDF document text
    • https://zigudufojivop.weebly.com/uploads/1/3/4/7/134718002/3ca41c28.pdfIn PDF document text
    • http://karaulovlife.site/gomujisukopilitedere9ezve.pdfIn PDF document text
    • http://bluebadge-support.com/sajutugoruses651m0.pdfIn PDF document text
    • https://zirotowaze.weebly.com/uploads/1/3/1/0/131070424/jadefuzosu_wuxiwiva_puzuwipefolis_zijijadepuros.pdfIn PDF document text
    • https://sebigazawipad.weebly.com/uploads/1/3/0/8/130814057/najiziwisazif.pdfIn PDF document text
    • https://xaruxetadelu.weebly.com/uploads/1/3/4/4/134478950/buzadi.pdfIn PDF document text
    • https://bevazamosip.weebly.com/uploads/1/3/5/3/135345421/a35e7d0c8.pdfIn PDF document text
    • https://ralanuda.weebly.com/uploads/1/3/0/7/130775203/jubikodapufozo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tasopawak.rf.gd/powerpoint_theme_free_template.pdfIn PDF document text
    • https://s3.amazonaws.com/megujobemegor/46128204432.pdfIn PDF document text
    • http://motinekan.epizy.com/modern_probability_theory_b_r_bhat.pdfIn PDF document text
    • http://wutewak.rf.gd/hsbc_online_assessment_test_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/vigevot/ionic_4_dashboard_template_free.pdfIn PDF document text
    • https://s3.amazonaws.com/panokojol/amityville_2015_full_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/dojonuta/free_action_movies_websites.pdfIn PDF document text
    • http://vatasinunevuto.epizy.com/microsoft_dreamspark_visual_studio_2010.pdfIn PDF document text
    • https://s3.amazonaws.com/sefipa/brain_teasers_funny_riddles_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/gizonukorad/quaid_e_azam_university_admission_form_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/dazinibonofobi/free_music_s_for_phones_full_songs.pdfIn PDF document text
    • https://s3.amazonaws.com/wuwabobujasivor/suxipuwamizoredalalik.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_off0000f7a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7A7 4988 bytes
SHA-256: 887588a327febe59165f56f6458f4ebe67cdf4db9232a61c2254982d54cf280d
font_01_sfnt_off000108c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108C3 10960 bytes
SHA-256: c314d49769d20ece99442197c0615f2c2de9483cd039e8f45199237e896a030d

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