Malicious PDF — malware analysis report

Static analysis result for SHA-256 10853003bddee813…

MALICIOUS

PDF

63.5 KB Created: 2021-03-18 17:28:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 218221f4ad75b95a952be2397238c5fd SHA-1: 088859fd418a4a812455271e3692685237539b4e SHA-256: 10853003bddee813463d7fc33d1c05afc261befedb20db903ea9ddf84b68d8d5
154 Risk Score

Malware Insights

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

The file is a PDF that contains a link to a known malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded URL likely leads to a phishing or malware distribution site, masquerading as a document about pediatric gastroenteritis.

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://dafemum.ru/award?keyword=gastroenteritis+akut+pada+anak+pdf In PDF document text
    • https://cdn.sqhk.co/rusukumuva/bLiipIw/concerning_hobbits_piano_easy.pdfIn PDF document text
    • https://cdn.sqhk.co/remonupode/bihZgd6/ronufi.pdfIn PDF document text
    • https://cdn.sqhk.co/gujuvizaja/hbsi5ij/movistar_plus_lite_login.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410986/normal_5fe4807139a42.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376856/normal_60184f242197e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393181/normal_6024c57ccb135.pdfIn PDF document text
    • https://cdn.sqhk.co/magatile/iaG3eTf/74122030767.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413454/normal_6045143d02568.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446491/normal_6028b86f47ebb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475874/normal_6032665ee5042.pdfIn PDF document text
    • https://cdn.sqhk.co/leporolino/dPQyqPf/wogutuweluluvimosegoju.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/fejififimaketo/ashilla_zee_apalah_arti_menunggu.pdfIn PDF document text
    • https://s3.amazonaws.com/wixamupelinere/watch_live_streaming_app_android.pdfIn PDF document text
    • http://pusebirenox.myartsonline.com/vipolekoxafuretu.pdfIn PDF document text
    • https://s3.amazonaws.com/widofafane/build_your_own_computer_parts_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/dudurat/ich_good_clinical_practice_guidelines_for_research.pdfIn PDF document text
    • https://s3.amazonaws.com/matogapibelifiv/45172592808.pdfIn PDF document text
    • http://danebusuji.onlinewebshop.net/gajiwelowidojoronipapa.pdfIn PDF document text
    • https://s3.amazonaws.com/liwafo/creative_writing_worksheets_for_class_3.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_off0000bf1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF1A 5096 bytes
SHA-256: 0b7e6e737a3d1d975927684f7e037165e134ffaf622584855c378c3183099a45
font_01_sfnt_off0000d086.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD086 9532 bytes
SHA-256: 970f92b300f1cf8858658234d38d43e592c58ff554312c0735c597e44265a28a

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