Malicious PDF — malware analysis report

Static analysis result for SHA-256 17254df6990b84fd…

MALICIOUS

PDF

67.7 KB Created: 2020-11-18 12:37:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 185d53857fc7a433bb1eaed486c53652 SHA-1: fe3acee70de01d21f3a096731176cbb574b7ff75 SHA-256: 17254df6990b84fd61f79c13b975f52f1ad9207002bb723ccec9205e6a77a9a8
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains multiple embedded URLs, with one identified as a malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent. The primary attack pattern involves luring the user to a malicious site, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://ggtraff.ru/strik?utm_term=jrcalc+2013+pdf+free In PDF document text
    • https://walijogopabo.weebly.com/uploads/1/3/0/7/130776167/tunavefupurufi.pdfIn PDF document text
    • https://gogebuzavoriro.weebly.com/uploads/1/3/2/6/132681212/marekarukedel.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/zikarab.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/c001d70f-902b-4d63-90b6-a7e49521755b/lawomexunuzak.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/queen_bohemian_rhapsody_piano.pdfIn PDF document text
    • https://s3.amazonaws.com/fekazudabo/vexelob.pdfIn PDF document text
    • https://s3.amazonaws.com/zerejibixupav/27588523981.pdfIn PDF document text
    • https://s3.amazonaws.com/xakapudakadu/anti_apostle_1025.pdfIn PDF document text
    • https://s3.amazonaws.com/fevobelijogal/50277338441.pdfIn PDF document text
    • https://s3.amazonaws.com/mefovu/15915540151.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/652f002b-93c3-4546-b4c9-e4f63c446395/ite_benim_neslim_bunlar_dinleme_metni.pdfIn PDF document text
    • https://s3.amazonaws.com/tapelu/69271496920.pdfIn PDF document text
    • https://s3.amazonaws.com/kudufigunabi/gibagi.pdfIn PDF document text
    • https://s3.amazonaws.com/xunilukegez/12066262498.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_off0000c9ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9CE 5448 bytes
SHA-256: 908033792709c679694773065b4bbb4dfb60593e6990a8153b46a74f6e27ecef
font_01_sfnt_off0000dc6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC6B 11268 bytes
SHA-256: 96d255d62da2c9c9b6153ac8ae72c4bcf5cb89c792c8564638a8898493d26cb8

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