Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3c183dac13e8a2a…

MALICIOUS

PDF

78.0 KB Created: 2021-02-22 02:41:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: b068193affd08b6de51614c6d1010a38 SHA-1: f89039478239700da236af9e999d8b2fed3ba6e3 SHA-256: d3c183dac13e8a2a70e2fbabffd9152c1d84a8becc00f1c82fa272cb7d735b11
104 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of embedded URLs and a heuristic firing for a visual download button suggests a phishing or social engineering attack. The document likely aims to trick the user into clicking a link or downloading a file, potentially leading to further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://bologen.ru/wb?keyword=ti-nspire%20scientific%20calculator%20online PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4417214/normal_5ff66ebab82d0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373261/normal_5ff29717a10af.pdfIn PDF document text
    • https://dubelaxelafef.weebly.com/uploads/1/3/1/1/131164372/9039589.pdfIn PDF document text
    • http://trikolor.site/57212979743ow9nk.pdfIn PDF document text
    • https://cdn.sqhk.co/mogizufofuj/gdgcwjb/burger_king_specials_going_on_now.pdfIn PDF document text
    • http://seamanygau.best/analgesia_in_labour_guidelines8q7bk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495400/normal_602c085dde1e7.pdfIn PDF document text
    • https://mepotogi.weebly.com/uploads/1/3/4/7/134737672/f324bcb.pdfIn PDF document text
    • https://munejubulogulep.weebly.com/uploads/1/3/4/2/134266186/404dca927a7c3b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470964/normal_5fea24fe64a4a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404503/normal_5ff6909f840ed.pdfIn PDF document text
    • http://picsonair.com/the_thin_book_of_appreciative_inquiry_3rd_editionwbbmg.pdfIn PDF document text
    • https://sejevijuwev.weebly.com/uploads/1/3/2/7/132712154/zelosawalora.pdfIn PDF document text
    • http://idem-peshkom.ru/15448323211bofo8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457305/normal_5fc8c828a7a1b.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/waduzirader/kangaroo_math_2019_answer_key.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_off0000f485.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF485 4992 bytes
SHA-256: 257d6f5ec5affbb8e3067814ea8bd4e4418da99fe1e30d3b1fd4930165800b2f
font_01_sfnt_off00010597.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10597 10916 bytes
SHA-256: 9eb531b5e85287b3288566fa8c09c58c2b396276d75b400451a5539a3c034d0d

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