Malicious PDF — malware analysis report

Static analysis result for SHA-256 7aaf4368e02447ef…

MALICIOUS

PDF

60.2 KB Created: 2020-12-04 17:07:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 2af672f0c4836328c3384e0fadc7a2f0 SHA-1: 34fe460f8c0320295b941419f667b39e9d95f784 SHA-256: 7aaf4368e02447efde9e64ef257162283d0679638dd8564f6bc3cf2a20ec1d60
194 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains embedded links that redirect to known malicious infrastructure, identified as a phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to trick users into visiting a malicious site, likely for credential harvesting or malware delivery.

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
  • 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.
  • 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://gettraff.ru/wb?keyword=king%20single%20flannelette%20flat%20sheets In PDF document text
    • https://cdn-cms.f-static.net/uploads/4470402/normal_5fb8d74e89dcd.pdfIn PDF document text
    • https://fukikabigo.weebly.com/uploads/1/3/4/4/134457586/4828422.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368999/normal_5f9265298741c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423453/normal_5fb72e2fbd293.pdfIn PDF document text
    • https://voxapinave.weebly.com/uploads/1/3/2/7/132740917/wimomapamoxuzew-dadizozufigod-torajelu.pdfIn PDF document text
    • https://dedelazixuni.weebly.com/uploads/1/3/4/5/134596723/kopisikaluran.pdfIn PDF document text
    • https://bogadisosupotaj.weebly.com/uploads/1/3/0/7/130776541/nofoj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365662/normal_5f880085d01d5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385198/normal_5f92cf49e385d.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/zopenave/facebook_video_er_pc_exe.pdfIn PDF document text
    • https://s3.amazonaws.com/tofizo/haloalkanes_and_haloarenes_ncert_exercise_solutions.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_off0000aed0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAED0 4904 bytes
SHA-256: 27b1f86eb1544a7ba6ddad3fa56e4ba14d9294e7b1542144082dddf0e14211b8
font_01_sfnt_off0000bf90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF90 10784 bytes
SHA-256: 192b4869290def8f8c35e750bf80497834dedf80ca8cc4114a838cd5ad4ab2a9

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