Malicious PDF — malware analysis report

Static analysis result for SHA-256 44a06504245bff54…

MALICIOUS

PDF

59.0 KB Created: 2020-12-03 15:31:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: dc49253661f4e318bfa3507f835f952e SHA-1: 6c0d69b6a1dc01ba39d218bfefa705fc26526759 SHA-256: 44a06504245bff54977d88cce84b9adc95eb4641932d75262c03fa4c05b997a1
192 Risk Score

Malware Insights

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

The PDF file contains a lure referencing 'Actemra dosing guidelines' and embeds a link to known malicious redirector infrastructure. This suggests a phishing attempt to lead users to a malicious site. The ML classifier and ClamAV detection further support the malicious nature of the file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7756

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://gettraff.ru/wb?keyword=actemra%20dosing%20guidelines In PDF document text
    • https://cdn-cms.f-static.net/uploads/4426277/normal_5fa2b5815cafe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415291/normal_5f9ffe3c66a19.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446773/normal_5fc679cf0ceb9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408596/normal_5fc6d69c1ef63.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365619/normal_5fc37fa8907b6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367304/normal_5f875a213a9da.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424933/normal_5fa4b2a619d87.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdfe203c02f22b9dd3811c/1606286882285/51168568913.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe3b193c6ccf69f32a4b02/1606302489770/relulafixuruvejugatibe.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc59b4fbdb33045eee230e9/t/5fc774143d56556d143e9070/1606906901637/60296989087.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc01930403f5353fd916186/t/5fc41f21f3de5e49b5e64e7f/1606688545819/the_guide_rk_narayan_summary.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf4fd83485235c86bcf03c/1606373337008/kuzeruzim.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc109232cf09257bd6ccb44/t/5fc360c81972c46e3c09401d/1606639817361/dbq_on_second_industrial_revolution_essay.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dcf9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCF9 5248 bytes
SHA-256: 678746890dd98094b3db3a3e5aa0f3bf4a49f8e08245485c60b7cd0dcc610ba4