Malicious PDF — malware analysis report

Static analysis result for SHA-256 619d1f8b2889ea00…

MALICIOUS

PDF

67.9 KB Created: 2021-01-11 09:39:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: d3ca6e8d1c74aad55cc03a7aadf06445 SHA-1: c0caa1f2c7de409cf6bb6715d37674bece852876 SHA-256: 619d1f8b2889ea00d6387ddf3bc72e6cd798f2b7ffce073da653acf6c3424295
154 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • 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/123?utm_term=negative+assurance+example In PDF document text
    • https://cdn-cms.f-static.net/uploads/4381095/normal_5f8dd88212efc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417308/normal_5fa2949315bf2.pdfIn PDF document text
    • https://site-1083781.mozfiles.com/files/1083781/17232954585.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376609/normal_5fa20f7a21405.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370989/normal_5f8e3a59ee389.pdfIn PDF document text
    • https://site-1171987.mozfiles.com/files/1171987/makigakiwagifofupadazafuf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465537/normal_5fbb79011554b.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/dakebesuvum/33977726698.pdfIn PDF document text
    • https://s3.amazonaws.com/xamapebonijos/android_messages_for_web_review.pdfIn PDF document text
    • https://s3.amazonaws.com/salosibejodod/gokipanir.pdfIn PDF document text
    • https://s3.amazonaws.com/sefipa/fanukutet.pdfIn PDF document text
    • https://s3.amazonaws.com/wapabefizosumi/mahalaxmi_calendar_2016_in_marathi_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/bisizuvumi.pdfIn PDF document text
    • https://s3.amazonaws.com/wumodukubaru/putuzujesi.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_off0000cb92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB92 5352 bytes
SHA-256: a6d343951e4a5bf2b161ba3a654a0925791ed6d613f20dc7ccd4c24e13a10e5b
font_01_sfnt_off0000ddc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDC7 10956 bytes
SHA-256: c0ada98b355f120fb1078e11e77701f164b7f4507ff98142b05936cab688d97a