Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad631d5666d6f23f…

MALICIOUS

PDF

70.4 KB Created: 2021-01-28 18:32:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: f078cd9d853a0ed0ba5f320deddd8517 SHA-1: a0e9a5ca53e06e9ae3b3df410349b15f211ace84 SHA-256: ad631d5666d6f23f0324540d28431bcc701b09052e3fc6f01c186c50d1b9a92a
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, indicating an attempt to phish or deliver malware. The ML classifier and ClamAV detection strongly support its malicious nature. Although no scripts were extracted, the embedded URL is the primary indicator of malicious intent, likely leading to a phishing page or further malware download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • 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://ggtraff.ru/wb?keyword=brahmaputra%20river%20facts In PDF document text
    • https://static.s123-cdn-static.com/uploads/4450438/normal_5fe240e8484a6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455387/normal_5fe3853a81f0d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380411/normal_5fe3a01f73013.pdfIn PDF document text
    • http://fruit-ital.space/company_of_heroes_2_cheatsqib1u.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490754/normal_5fc5fb90aa27b.pdfIn PDF document text
    • http://mikakovakoj.iblogger.org/4617754237.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376598/normal_5feec61659aeb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470685/normal_5ff24c3de6755.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/baxegezivumi/antho_kalvariyil_song.pdfIn PDF document text
    • http://turegipamikum.epizy.com/xuremukijenejusevawutuso.pdfIn PDF document text
    • http://vefagukolile.epizy.com/dulajasafanebomeba.pdfIn PDF document text
    • https://s3.amazonaws.com/guwutivupudutu/bootstrap_form_message_box.pdfIn PDF document text
    • https://s3.amazonaws.com/ginutu/lagu_gratis_cinta_luar_biasa.pdfIn PDF document text
    • http://tusibav.epizy.com/ginuvuge.pdfIn PDF document text
    • http://sajavisazoz.epizy.com/beach_buggy_racing_2_premium_apk.pdfIn PDF document text
    • http://kokokifutalikop.epizy.com/32686561639.pdfIn PDF document text
    • https://s3.amazonaws.com/samopakamefap/latest_chromedriver_ubuntu.pdfIn PDF document text
    • http://jozixal.epizy.com/16751763496.pdfIn PDF document text
    • http://pomagupivedib.epizy.com/homeschool_corecommerce_free_lapbook_templates.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_off0000d6ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6CA 5332 bytes
SHA-256: f82a6eaba365e72c708a16f67831b5840845c4f41a5ac0b9fa2e2f283aa91956
font_01_sfnt_off0000e8ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8CA 10548 bytes
SHA-256: 6e716ba29a05f86074dd73dd7631df1c71dba01cb3ed575aea6956da66e149e9

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