Malicious PDF — malware analysis report

Static analysis result for SHA-256 16f391315d202956…

MALICIOUS

PDF

70.8 KB Created: 2020-12-21 18:15:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: e60b0bb60ae3f77b35e4e7bca7c927be SHA-1: e6d3410ce607ab9008b4270af06398734a19d37a SHA-256: 16f391315d20295679fe83d09d8f444000d7b50cdc366efb6dfcf2da84b846b1
214 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by multiple heuristics and a machine learning classifier, indicating it is likely a phishing or redirection campaign. It contains a large number of embedded URLs, many of which point to link farms designed to obscure the ultimate destination, with at least one URL leading to known malicious redirector infrastructure. No scripts were extracted from this sample, but the extensive use of embedded links suggests a phishing or content-luring attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://cctraff.ru/aws?utm_term=deadpool+game+imdb+parents+guide In PDF document text
    • https://xigokujote.weebly.com/uploads/1/3/4/6/134649591/fixifegos.pdfIn PDF document text
    • https://mapipuluzobeb.weebly.com/uploads/1/3/1/3/131398440/vukuruwekubu.pdfIn PDF document text
    • https://nimekeboxiz.weebly.com/uploads/1/3/0/8/130873861/sekebasaj.pdfIn PDF document text
    • https://nepuvojikonutoz.weebly.com/uploads/1/3/4/6/134677469/9311811.pdfIn PDF document text
    • https://bileravufal.weebly.com/uploads/1/3/4/7/134749654/pibavunikokujopewe.pdfIn PDF document text
    • https://sifukimoja.weebly.com/uploads/1/3/4/3/134357082/6128878.pdfIn PDF document text
    • https://nodopotol.weebly.com/uploads/1/3/4/0/134018708/kunadepakiwu-dobodakoziwo-sewirowugamaf-jesiximujixaw.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/pipaneku/divinity_original_sin_strategy_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6419b2b3-f29e-4a0d-9636-d584460c64cc/zofakin.pdfIn PDF document text
    • https://s3.amazonaws.com/kuxuxemu/ditifugegerexuniw.pdfIn PDF document text
    • https://s3.amazonaws.com/batiku/fegimizafaw.pdfIn PDF document text
    • https://s3.amazonaws.com/wewuxuviwar/porivosaxipa.pdfIn PDF document text
    • https://s3.amazonaws.com/jipowumat/wixag.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_off0000d98c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD98C 5416 bytes
SHA-256: a4711893a753da5932cc913b97dc6ca89e8ddc2cd1d7076ae81ebe4e3e5d4030
font_01_sfnt_off0000ebdf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBDF 10068 bytes
SHA-256: 2da9a6b97768841a3ee9e0966b5aeb66a061506c90c9cdda0ff84cdab33057af

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