Malicious PDF — malware analysis report

Static analysis result for SHA-256 273e5599d063a79e…

MALICIOUS

PDF

69.6 KB Created: 2021-01-11 09:21:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 384da2129c06df32bc1cbfcbbd60161a SHA-1: 25e919f7f142677b134646c9705590d20955ee9e SHA-256: 273e5599d063a79e4e4f41c47e57935fe8744400ef76f271f7f5a5b70b245c5d
222 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, including a known malicious redirector, suggesting a phishing or malware distribution attempt. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and the ML classifier strongly indicate malicious intent. The presence of embedded URLs and the overall structure point towards a tactic of luring users to potentially harmful content, disguised as a movie download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/aws?utm_term=chunks+full+movie+free++hd In PDF document text
    • https://cdn-cms.f-static.net/uploads/4473035/normal_5fd3345c9ad57.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462974/normal_5fb04373d56c6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417314/normal_5fe359f908d37.pdfIn PDF document text
    • https://gujojiri.weebly.com/uploads/1/3/4/4/134434224/mufuvok_samabape.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477373/normal_5fc158272190b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460694/normal_5fb966956a28e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366627/normal_5f9576dd340e4.pdfIn PDF document text
    • https://bovuvodesibos.weebly.com/uploads/1/3/4/3/134377535/e61ed812bbe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415546/normal_5fe4ca1e8c6cf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383802/normal_5f933d8ab9a22.pdfIn PDF document text
    • https://nokajadum.weebly.com/uploads/1/3/4/8/134887388/xunul.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417033/normal_5fc19f5f1ec1b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425768/normal_5fa9011409b4b.pdfIn PDF document text
    • https://viwutexotopuj.weebly.com/uploads/1/3/4/5/134522905/zigureb-giteronula.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c63d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC63D 4884 bytes
SHA-256: ca23e5d79698d36886c8505cf6d465d71d6a8132c7354bbea84a94408147bb8b
font_01_sfnt_off0000d6a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6A5 10740 bytes
SHA-256: 22da7530698de31ded3443188832259f00879db1989a992427b813cbd6796db2
font_02_sfnt_off0000fb5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB5A 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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