Malicious PDF — malware analysis report

Static analysis result for SHA-256 8001a8a72addb560…

MALICIOUS

PDF

62.9 KB Created: 2020-12-08 04:09:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 87cf04e220e11119d469c3a42ae628fd SHA-1: 7eb4ba21a4cd93c73cdd63ed3455cc1db3353f04 SHA-256: 8001a8a72addb56023d2e833ad6f9df4d5984a48f0a1e09fb5efba563b901d54
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, which is likely intended to deliver a secondary payload or lead the user to a phishing site. The ML classifier and ClamAV detection strongly indicate malicious intent, consistent with a phishing or malware distribution campaign. The document body, though heavily obfuscated, contains text related to downloading a book, reinforcing the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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 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.
  • 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://cctraff.ru/123?utm_term=harry+lorayne+memory+book+pdf+download In PDF document text
    • https://static.s123-cdn-static.com/uploads/4392668/normal_5fc62c6423f6a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465935/normal_5fb44650ebfbf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422893/normal_5fa6dbb53a4d5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388063/normal_5fc9ba849292f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378383/normal_5fa2690f05ad4.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/napisakaluja/clash_hero_free.pdfIn PDF document text
    • https://s3.amazonaws.com/zalomi/netflix_movies_to_january_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/jebupofedijakuk/is_it_illegal_to_go_to_helltown_ohio.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc55652239b0722914ec2bc/t/5fc76b3293ad1a48121c0bcc/1606904626555/metal_slug_2_apk_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/redegelesibif/certificate_of_origin_form_d_cambodia.pdfIn PDF document text
    • https://s3.amazonaws.com/legenapi/55745705718.pdfIn PDF document text
    • https://s3.amazonaws.com/jukoxisojow/chaser_movie_300mb.pdfIn PDF document text
    • https://s3.amazonaws.com/bopuxosavubare/learn_aramaic_language.pdfIn PDF document text
    • https://s3.amazonaws.com/fajeloninesitel/marshall_headphones_monitor_bluetooth_manual.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_off0000b96f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB96F 5368 bytes
SHA-256: 55c9c1555f3cf8b9bd90ff04b597d6bf6e054122c6e4a0816e02f0b774e220ae
font_01_sfnt_off0000cbaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBAF 10304 bytes
SHA-256: 2a03dd7bb0bdd4846c931a0d7b623df05aa6b77de7ee73e83f7906331c5c0a60

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