Malicious PDF — malware analysis report

Static analysis result for SHA-256 253b5ed581fd6140…

MALICIOUS

PDF

94.9 KB Created: 2021-05-28 19:48:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 791402143bea627b8ec46f2e93470a45 SHA-1: 105354e298f6dffc519bf5c89599b02a74cd1124 SHA-256: 253b5ed581fd6140055f2e51c34bb55b3d275a11783c24f552b90c385373b1fa
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 0.9989

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
  • 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://jacksth.ru/strik?utm_term=psychology+an+exploration+4th+edition+by+ciccarelli+free+pdf+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4447253/normal_604cddb615956.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457876/normal_605150fc17ecf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376086/normal_5fe962c49ddf2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496380/normal_60531705e371a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408993/normal_603c50b0214a3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459322/normal_5fcd8cd3ab59d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390071/normal_6028ed4cd64f7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415930/normal_604d3642cc680.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469638/normal_5feaf9ed17d6b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497348/normal_602de4778a5ae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409818/normal_604342503142c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448337/normal_6020da092578c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451929/normal_60055fbba280b.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In 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/ae2a2db1-e224-4a96-b0af-9a4cf91e725f/33268751524.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70e42923-f23a-4af8-a687-b8f0fa5bf982/revufanelaluxitu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3417ca86-171b-4d00-8fb8-81944868f6ff/2004_dodge_ram_1500_hemi_headlight_bulb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e44f7f35-6271-4a40-b1ea-b9bc077baba7/agatha_christie_books_buy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7495478-f76d-4422-9583-627438de42c4/77528821436.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d648abe-0184-4e39-8ac2-08e65dfb7e0e/geometry_symbols_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df511e4b-a4d6-4f9d-aace-62019b6c3bb4/metro_police_application_form_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf576a2f-dd58-4827-98be-a05aa5461514/how_much_do_management_consultants_make_per_hour.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a97e64f-79aa-4e34-a4bb-63c536977bbc/what_size_bobbin_does_the_brother_dream_machine_use.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/281a5b94-6706-498e-8b97-25ce0a832175/35371429298.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_off000129d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129D9 1872 bytes
SHA-256: cf373f8eb364677dc8d29ae0cbe658a1b8665e9067f0cd69b3a2e84d4b370a53
font_01_sfnt_off000132cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132CD 5908 bytes
SHA-256: 5e4dc9689018f9b2d32d79fee823f73c79fe34649e21707d08b41a79763ae029
font_02_sfnt_off00014708.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14708 11068 bytes
SHA-256: 2d7a6cab5b31355ec865feb449aedef6570d61241bd35e8076c64be8dfdcb58a