Malicious PDF — malware analysis report

Static analysis result for SHA-256 7cc9ccd613681e73…

MALICIOUS

PDF

65.6 KB Created: 2020-11-21 12:32:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 1138e3fd833de89e89a702790a396594 SHA-1: fda017488d23580583dae8ebdd3ca1b1f9489421 SHA-256: 7cc9ccd613681e73a683f98558c777f297db03b17f0d24c18158d5b7f4c0f8c4
254 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and a machine learning classifier. It contains a high number of embedded links, including one pointing to known malicious redirector infrastructure at 'traffine.ru'. The document also exhibits characteristics of a remote-support tool lure, suggesting an attempt to trick the user into installing or connecting to such a tool. The presence of numerous external PDF links indicates a potential link farm or SEO poisoning attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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://traffine.ru/aws?utm_term=burning+series+app+chip+android In PDF document text
    • https://cdn-cms.f-static.net/uploads/4407066/normal_5fb0336d1cf5e.pdfIn PDF document text
    • https://navadajedu.weebly.com/uploads/1/3/4/6/134614390/0d84a6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475379/normal_5faaed8a84fb8.pdfIn PDF document text
    • https://fofumizuzel.weebly.com/uploads/1/3/2/7/132740209/7640868.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368752/normal_5f8ca9104c4bf.pdfIn PDF document text
    • https://ritibamubube.weebly.com/uploads/1/3/1/4/131437410/b101bf445a9.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/lomogas/ecg_test_report_kaise_dekhe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5cb11d2b-f991-4703-acef-41d39930b914/70255651662.pdfIn PDF document text
    • https://s3.amazonaws.com/dinigugaxej/pluralisme_agama_di_malaysia.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/364cebcb-199e-4dd4-a1cb-b744b2a86c12/ferewurofumetotegiti.pdfIn PDF document text
    • https://s3.amazonaws.com/tozaduliwubega/non_enzymatic_browning_maillard_reaction.pdfIn PDF document text
    • https://s3.amazonaws.com/jikopot/los_15_minutos_con_jesus_sacramentado.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_off0000bdc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBDC8 5352 bytes
SHA-256: f0e2479a6fd32b83b7af3a78e4d463aa1b656b93de4094127a4420f7577cf78c
font_01_sfnt_off0000cff8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFF8 14176 bytes
SHA-256: fd8c51739ac9d5a50994a11f105b95e83136c630648c881a7b448e2307262884

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