Malicious PDF — malware analysis report

Static analysis result for SHA-256 54dbfc176155b61e…

MALICIOUS

PDF

77.5 KB Created: 2021-03-18 08:11:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: e72927d340dcbad358d834da089b886c SHA-1: 5c0df0964f80ba038b534de559ad03d2ccf53a8f SHA-256: 54dbfc176155b61e678be0327dfeb9d62cfc2bae4534aa1f5ff8814028633d1d
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one critical heuristic identifying it as a malicious redirector. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the primary function appears to be directing users to external URLs, some of which are associated with malicious redirectors, suggesting a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://yafferge.ru/123?utm_term=chat+room+android+app+free In PDF document text
    • http://usblighter24.site/el_rey_del_tomate_peliculaaq4vf.pdfIn PDF document text
    • http://tasuzafu.22web.org/can_you_keep_a_secret_film_review.pdfIn PDF document text
    • http://converstarget.ru/winulejajefelunadasosasanp7me1.pdfIn PDF document text
    • http://superheatbelt.xyz/weber_spirit_e200_partshh6mt.pdfIn PDF document text
    • http://am-sound.ru/cbse_class_5_maths_worksheets_with_answerscrqds.pdfIn PDF document text
    • https://xibokesobapud.weebly.com/uploads/1/3/0/7/130776239/telojamimurene-lesogejasu-rizufubijodamu.pdfIn PDF document text
    • http://goossyy.online/99616474255xw2ll.pdfIn PDF document text
    • https://verakolor.weebly.com/uploads/1/3/1/3/131379730/2257380.pdfIn PDF document text
    • https://tudegikugil.weebly.com/uploads/1/3/5/3/135317618/64039a9eb8.pdfIn PDF document text
    • http://xipevufizokev.iblogger.org/gojuvewifunuwinonuxikanik.pdfIn PDF document text
    • https://vuxuminitemup.weebly.com/uploads/1/3/0/8/130874085/dururir.pdfIn PDF document text
    • https://zomoxiwoginu.weebly.com/uploads/1/3/1/6/131637743/9272997.pdfIn PDF document text
    • http://banujal.iblogger.org/zizud.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/rurovikejigibu/arashi_ni_shiyagare_episode_guide_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/wekibik/employment_law_uk_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/jujadodedaruxix/78279631174.pdfIn PDF document text
    • https://s3.amazonaws.com/wofaxil/dajusozadira.pdfIn PDF document text
    • https://s3.amazonaws.com/xapijifas/sakuvedutefarila.pdfIn PDF document text
    • https://s3.amazonaws.com/gofiguj/simple_past_tense_form_of_do.pdfIn PDF document text
    • https://s3.amazonaws.com/vavapekadoliti/vepevonofowimabajakut.pdfIn PDF document text
    • https://s3.amazonaws.com/nijosinizo/third_grade_math_worksheets_printable_multiplication.pdfIn PDF document text
    • https://s3.amazonaws.com/bipovoromoj/video_show_mod_apk_free.pdfIn PDF document text
    • https://s3.amazonaws.com/fupanabivote/website_maintenance_report_template.pdfIn PDF document text
    • https://s3.amazonaws.com/gezejoputiwinu/cedarwood_doterra.pdfIn PDF document text
    • https://s3.amazonaws.com/zuguvoxoki/logitech_g900_wireless_adapter.pdfIn PDF document text
    • https://s3.amazonaws.com/devuxuzejozam/overwatch_baptiste_trophy_guide.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_off0000f294.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF294 4976 bytes
SHA-256: 0b87fbc761cc7043d79813da3e63b681741e2f023c175dfa0f3773e61bb3ed6c
font_01_sfnt_off00010350.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10350 11008 bytes
SHA-256: 7945af698b986a66be554466bb2eae75ab6edd953e8339b4daa44f20e493b044

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