Malicious PDF — malware analysis report

Static analysis result for SHA-256 c32ba9ab57593e94…

MALICIOUS

PDF

92.5 KB Created: 2020-11-24 04:23:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 3cbf9c7e5e3325bca8cf8b1ac668f5ed SHA-1: da009966d1946327d063d3142b0f103314198586 SHA-256: c32ba9ab57593e94f9e4d09d28f7454892a0b44600e02f25a0c4a84a412841e7
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 identified as a known malicious redirector. The ML classifier and ClamAV also flagged this file as malicious, indicating a phishing or malware distribution attempt. No scripts were extracted, but the presence of numerous external links suggests an attempt to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://traffking.ru/strik?utm_term=lab+4+plant+pigments+and+photosynthe In PDF document text
    • https://xexiwimelogodit.weebly.com/uploads/1/3/4/5/134593193/efad88e.pdfIn PDF document text
    • https://zakewurez.weebly.com/uploads/1/3/4/4/134471700/4c525ec1e44e.pdfIn PDF document text
    • https://nagigezivozitos.weebly.com/uploads/1/3/4/3/134340852/4571001.pdfIn PDF document text
    • https://bolififona.weebly.com/uploads/1/3/4/3/134316640/lejisirokilumoluzen.pdfIn PDF document text
    • https://wipaluxeko.weebly.com/uploads/1/3/4/3/134346688/jajefowibibitepozot.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497082/normal_5fb41ac8ed894.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/mawesenasijoser/allusions_worksheet_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/napisakaluja/kosedizixaralavokuzakulag.pdfIn PDF document text
    • https://s3.amazonaws.com/pisedij/lisezudulijel.pdfIn PDF document text
    • https://s3.amazonaws.com/zaxuledo/7011876749.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_off00012c08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C08 5548 bytes
SHA-256: 7a51971c8631917ecee0f30ea03763162f172763b6f3575425c439ae1b73f01a
font_01_sfnt_off00013ecd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13ECD 11372 bytes
SHA-256: ad48676d66bd919b72a93ed73358cdb8371429a61412c60ed87773221b86e205

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