Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e211e97caf156fe…

MALICIOUS

PDF

83.1 KB Created: 2021-03-02 14:52:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dc4bb4cbf17ff284964b512acada9a94 SHA-1: d7b10a45184c7ddfdf64be9fa59a2ca471fdefd8 SHA-256: 9e211e97caf156fe9e955be93dad8ab788f2bcbed858077520597afe560087bf
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable domains, a common tactic for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to redirect users to malicious content, likely as part of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://resalured.ru/strik?utm_term=what+is+wrong+with+the+criminal+justice+system+in+america
    • http://mapotilij.mygamesonline.org/53837163478.pdf
    • http://zixivudu.getenjoyment.net/el_sistema_endocrino_esta_formado.pdf
    • http://swast-group.website/fumisefumuzemewodoxorukeoizoj.pdf
    • https://bagubabijotete.weebly.com/uploads/1/3/4/3/134319258/8310519.pdf
    • https://tusidotug.weebly.com/uploads/1/3/4/4/134482214/dogotus.pdf
    • http://com-signto5.xyz/super_tank_rumble_hack_apk_latest_versionggz3h.pdf
    • http://sufulilutidake.mypressonline.com/5978737116.pdf
    • http://santand-es.com/mitosis_worksheet_biology_answer_keyby6y3.pdf
    • https://mafidusat.weebly.com/uploads/1/3/4/1/134109097/tumaridumuzij-xatusedaru-mesilum-vegatatotugukef.pdf
    • http://itwomen.space/xegupodaparu66gai.pdf
    • https://cdn-cms.f-static.net/uploads/4495976/normal_5fd0b18b65a45.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://nuwudepebepusab.rf.gd/rarulibime.pdf
    • http://girofili.myartsonline.com/34155796684.pdf
    • http://xekazaz.myartsonline.com/davoxojogipomoxegik.pdf
    • https://s3.amazonaws.com/gawabog/85766833137.pdf
    • http://bamefifib.epizy.com/catalogo_jequiti_09_2019.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010629.bin
602b17e5f801b0ae6ab78d7b04dbdf73ff720b47f9f60a3f8679ec37c6d4f2de		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10629 5496 bytes
font_01_sfnt_off000118cc.bin
80c610d62e8045a1c4584f66b12aa08d6116da9af47ccebff35319bb488245df		 pdf-font-stream PDF embedded font (sfnt) at offset 0x118CC 11072 bytes

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