Malicious PDF — malware analysis report

Static analysis result for SHA-256 51b2bb605b0f643b…

MALICIOUS

PDF

71.3 KB Created: 2020-12-03 13:39:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 851794c92f5838f8d8f40ea952f148fe SHA-1: 9c270f69f07527210d5d352996bcb925034dedf6 SHA-256: 51b2bb605b0f643bd5f31993741a8f88a5dd2096c88b061de4bdcba931e715d8
96 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://trafficel.ru/123?utm_term=fashion+designer+resume+sample PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366341/normal_5f8ff63b089dd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374189/normal_5fa96211c3136.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391903/normal_5f8e874642499.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473047/normal_5fa6bc0dd4d7d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456165/normal_5fbbb8ae177cc.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/sugosubexez/wrong_turn_full_movie_in_isaidub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/31b06175-97a9-40ca-a70a-7f5f52a41a15/20546681087.pdfIn PDF document text
    • https://s3.amazonaws.com/xesigeze/corning_painted_post_high_school_principal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c217c52d-42a4-4c74-aa65-1b9ea2f91484/78466808721.pdfIn PDF document text
    • https://s3.amazonaws.com/gitipelut/labetalol_davis_drug.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb918391-85c7-4994-aab5-74f3de5bb4e0/19256708816.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_off0000cdbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDBF 5128 bytes
SHA-256: f3b5fb52470579d11f98770430787f14dd1a765a71996101b040f639f2f25d2b
font_01_sfnt_off0000deed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEED 10480 bytes
SHA-256: 4861192d776a77f58b9e4a4bddc3523a31897fe85045d0d866d6c7b4b5707ff6
font_02_sfnt_off000102c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102C4 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333