Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad3887ac7b4ab535…

MALICIOUS

PDF

65.5 KB Created: 2021-02-20 09:45:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 039f28f38f88beda03f51eb2c6d82b3e SHA-1: 292ba8928f4b020cd8cedbdf6a43fad46eda7bf9 SHA-256: ad3887ac7b4ab53582f698a0b7ab7efd392e17a5afdf23c53db289adbe756f7b
96 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The embedded URL, https://maypoin.ru/wix?keyword=wise+old+owl+daycare, is a primary indicator of a phishing or credential harvesting attempt. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest it's designed to redirect users to potentially harmful content.

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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://maypoin.ru/wix?keyword=wise+old+owl+daycare PDF link annotation
    • https://cdn.sqhk.co/devepogisog/hihbjjd/fonawijonoveb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418783/normal_6018a9cf1e1c6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464534/normal_6017c733a83e9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372384/normal_5fd658626f062.pdfIn PDF document text
    • https://cdn.sqhk.co/nebafori/hackPhb/necromancer_definition_example.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375209/normal_5fc717e150b23.pdfIn PDF document text
    • https://cdn.sqhk.co/juvanejejuwo/herjhib/duck_shooting_game_free_online.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464068/normal_60274d82c60d4.pdfIn PDF document text
    • https://cdn.sqhk.co/donaxewon/hftijgc/2388857831.pdfIn PDF document text
    • https://cdn.sqhk.co/wirowanorax/sNtgfjf/jumia_black_friday_kenya_2019.pdfIn PDF document text
    • https://cdn.sqhk.co/molivovuki/dNja4hf/general_hospital_nelle_dies.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/jojitagifuva/pijikewumiwulazuwetuku.pdfIn PDF document text
    • https://s3.amazonaws.com/pegozegi/bloc_quebecois_platform_reddit.pdfIn PDF document text
    • https://s3.amazonaws.com/nabifovu/20099773232.pdfIn PDF document text
    • https://s3.amazonaws.com/fajujiju/pandora_s_box_5_game.pdfIn PDF document text
    • https://s3.amazonaws.com/bajuse/cushing_syndrome_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/mamibis/22715537541.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b860.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB860 4744 bytes
SHA-256: bc6fe71495fb9fea1bfc6e712ec06ffaa2c2118e430d50487f05bb2a6e27b1e4
font_01_sfnt_off0000c89f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC89F 10016 bytes
SHA-256: b71f607a05ced16f2689de849c8919e30fc6ebb53158b3731e67c3b42460e08a
font_02_sfnt_off0000eb0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB0E 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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