Malicious PDF — malware analysis report

Static analysis result for SHA-256 73bc686eb9259250…

MALICIOUS

PDF

74.6 KB Created: 2020-12-29 20:09:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 2af2a2cc69a1ab2ea96372e73a25c40b SHA-1: ef5bf499216f954acefdb276cf5258fdd16a4c48 SHA-256: 73bc686eb9259250c6c07729c53baa0952124b58ee6e8838a713c3ae02903c26
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. The ML classifier also strongly flagged this PDF as malicious. The embedded URLs suggest an attempt to lure the user to a potentially malicious site, likely for phishing or to download further malware. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ggtraff.ru/123?utm_term=4th+and+goal+2015+unblocked+at+school In PDF document text
    • https://cdn.sqhk.co/dedikunakudu/Ache2jj/91828396375.pdfIn PDF document text
    • https://vezitiratad.weebly.com/uploads/1/3/1/8/131856143/gekajedexim_simosujogi_minokijinasofej.pdfIn PDF document text
    • https://cdn.sqhk.co/sejixikerut/jaicVhe/4547556700.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459629/normal_5fd1d38d2d05c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376096/normal_5fbee495aa2d5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451221/normal_5fde547e87ae0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386076/normal_5fd604ce8f85d.pdfIn PDF document text
    • https://dobuxavebixeli.weebly.com/uploads/1/3/4/7/134725246/2014823.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/c06d1ba7-354a-4be4-b3a6-fbe497395887/wixule.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/362025d0-d69b-45b1-8fe1-102207100a72/puvatuta.pdfIn PDF document text
    • https://s3.amazonaws.com/takeju/3704463127.pdfIn PDF document text
    • https://s3.amazonaws.com/juzinaramip/autorap_pro_apk_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2f7da49-0665-4200-ba8d-83eeb6099170/adventure_time_streaming_australia.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_off0000e490.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE490 5752 bytes
SHA-256: 7d1df06fd693909c7db00f5c7f99cb24e47fb6df71c5917d21e9045698fbf760
font_01_sfnt_off0000f82e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF82E 11000 bytes
SHA-256: d8617fcfb1dc6942db8e47f72c35dd54e0af56cc764080506a05fbe0d0207687

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