Malicious PDF — malware analysis report

Static analysis result for SHA-256 396ed82efd221119…

MALICIOUS

PDF

76.0 KB Created: 2021-05-22 08:21:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 48c15187c68583e6a5c6a9396c4a30ca SHA-1: 3d524ef41d8f64cfa5f17dbe626c30fa700f1ec0 SHA-256: 396ed82efd221119f20d95e0b20f03b1c14df97e4d9418ffb6efa603aa411948
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a common tactic for link farms or phishing campaigns. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, and one specific URL, 'https://ponafet.ru/strik?utm_term=can+you+take+your+own+passport+photo+ireland', is directly embedded. ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious classification. No scripts were extracted, but the presence of many external links suggests the document's primary purpose is to redirect users to potentially malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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.
  • 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://ponafet.ru/strik?utm_term=can+you+take+your+own+passport+photo+ireland PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4425737/normal_5fd5fb9642655.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476416/normal_6056dac43421c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496602/normal_604fe46eb0ae8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413239/normal_6020543ebc1ca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365613/normal_60450ab15383f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408479/normal_5feba69def805.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448540/normal_601b3acfb43be.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447084/normal_6032e7317d3c8.pdfIn PDF document text
    • https://tefitosuwit.weebly.com/uploads/1/3/4/4/134478986/9798892.pdfIn PDF document text
    • https://xudubuwar.weebly.com/uploads/1/3/4/0/134041851/legel-nafiwusawetani-wibevademadet-kegoxemol.pdfIn PDF document text
    • https://kobenavu.weebly.com/uploads/1/3/4/7/134714827/3915557.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391925/normal_60512449369cf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501479/normal_5fe8f04c4fa5c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4498893/normal_60353f5eedfa6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386848/normal_5fd158556c52e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443619/normal_605a787f1e2d1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427809/normal_60337f001e610.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456165/normal_5fd15e527bddb.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/natewared/what_is_the_best_tactic_for_football_manager_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/pibajuwi/doranodiwipubaf.pdfIn PDF document text
    • https://s3.amazonaws.com/pukiza/bullet_train_in_india.pdfIn PDF document text
    • https://s3.amazonaws.com/ligole/yellow_apple_clipart_free.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_off0000ebbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBBF 5208 bytes
SHA-256: 64c491047d2d9740beb36a72b428594960b1685af967e61468dea13921382f18
font_01_sfnt_off0000fd83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD83 10824 bytes
SHA-256: d4417ee01556720ec4cd635085f1e9d04579464956c0af445b347417ab550ee0

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