Malicious PDF — malware analysis report

Static analysis result for SHA-256 16f1b0fc0910906b…

MALICIOUS

PDF

144.3 KB Created: 2021-01-26 08:48:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 17c839848fa07dbea97e9152cdda80d6 SHA-1: 408e7c08c9d89a4f217de942fb95ad43eaa4c8ea SHA-256: 16f1b0fc0910906b624655f6fc2bbd83e56c87940a675d7d25c9d8cb36cf132f
214 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with the primary one redirecting to a malicious site related to 'digimon xros wars season 3 download'. Heuristics indicate a malicious redirector and a link farm, suggesting the document's purpose is to drive traffic to potentially harmful content. The ML classifier and ClamAV detection strongly support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/wb?keyword=digimon%20xros%20wars%20season%203%20download In PDF document text
    • https://gazuxajolitivik.weebly.com/uploads/1/3/4/7/134770387/napadi-vobifemowadasi-fesuxo.pdfIn PDF document text
    • https://cdn.sqhk.co/jitolado/jdRHhgY/cute_girly_wallpapers_2020.pdfIn PDF document text
    • http://dulexip.22web.org/9321125415.pdfIn PDF document text
    • http://datekal.22web.org/guidelines_for_treatment_of_depression_and_anxiety.pdfIn PDF document text
    • https://binapesod.weebly.com/uploads/1/3/1/4/131438069/8968536.pdfIn PDF document text
    • https://wuneregogituweg.weebly.com/uploads/1/3/4/6/134686440/6265206.pdfIn PDF document text
    • https://bodarisijusafu.weebly.com/uploads/1/3/5/3/135383154/3925319.pdfIn PDF document text
    • https://cdn.sqhk.co/vesagivara/gejadjh/zombie_harvest_mod_apk_android_1._1._9.pdfIn PDF document text
    • https://bufigolumixi.weebly.com/uploads/1/3/4/2/134234787/zirawim.pdfIn PDF document text
    • https://cdn.sqhk.co/lazodadevab/SKrhhib/76499585930.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zarevarepi.epizy.com/pedatokagu.pdfIn PDF document text
    • https://s3.amazonaws.com/vixuwogetiv/56784364089.pdfIn PDF document text
    • https://s3.amazonaws.com/wovedukevikov/if_back_button_pressed_android.pdfIn PDF document text
    • https://s3.amazonaws.com/folexapurilowe/zagenobufujerogipotuluz.pdfIn PDF document text
    • https://s3.amazonaws.com/vasofirida/404_error_page_template_bootstrap.pdfIn PDF document text
    • http://didaduxazej.epizy.com/96609974909.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxenipup/ccna_cyber_ops_chapter_9_exam_answers.pdfIn PDF document text
    • http://nirobow.epizy.com/66274098510.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014e7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14E7D 56300 bytes
SHA-256: 22fe273daeeae07976601ba7dc925d6faa8ecaf6c5c942fc47ce7fa6f2f85165
font_01_sfnt_off0001fa04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1FA04 5468 bytes
SHA-256: 82038230235618263869537bcc8fff763d495e4cbf152f3dc6079ba45ceee3d4
font_02_sfnt_off00020ca0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20CA0 11768 bytes
SHA-256: b6895c5ad7f8cb0c56705b6d5633ff8440150b281237f17b1877cb3aba667d1a

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