Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b9abe78fd081a3c…

MALICIOUS

PDF

94.5 KB Created: 2021-05-27 21:59:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 05fb9b578814c7b0bd361e71d3d76426 SHA-1: f5f69f90495d54c04a570b62abe20e57a8642c68 SHA-256: 5b9abe78fd081a3c1cfb029dae43646aa6a9003320a4b978b68a91529dd70c44
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 phishing or trojan payload. The document body, though heavily obfuscated, contains text suggesting a lure related to life stressors, likely intended to trick the user into interacting with embedded links. No scripts were extracted, but the presence of embedded URLs and the overall detection suggest it functions as a downloader or phishing page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://cdn-cms.f-static.net/uploads/4370294/normal_604d5c396aedc.pdf In PDF document text
    • https://static.s123-cdn-static.com/uploads/4421335/normal_5fcf13a0066eb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404523/normal_602695bc8e427.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409813/normal_6034c84d7a779.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384028/normal_6013237a4490d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415327/normal_5fdcf9c42f788.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495042/normal_5fd6721ead7f6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383795/normal_5febff555bbe2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386091/normal_5fdd0a3678a63.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393020/normal_6020c4a672d2b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484807/normal_60450e436f79b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373516/normal_603093a3df137.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378379/normal_602d935af16a4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://feedproxy.google.com/~r/wb/ENAH/~3/KjdSuPfhPRY/wb?keyword=what%20are%20the%20top%2010%20stressors%20in%20lifePDF link annotation
    • https://uploads.strikinglycdn.com/files/feb4e212-a3dc-4582-9281-4877ceb16013/zokajafevusipatifiti.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e2436c9-04f4-4fcb-99c4-423847c5f756/what_are_the_structures_strengths_and_weaknesses_of_the_articles_of_confederation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0673c707-f07c-4e92-bee5-88eb5736291a/the_tempest_movie_2010_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80cc2df5-4242-4e8e-b242-6b6618086d9c/epson_stylus_nx230_price.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/829a031b-38ce-47ac-879b-7b40a15e00ee/geometry_chapter_9_resource_book_lesson_9.4_practice_b.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a1993fe-a121-4319-87b2-0650212b6571/mukejevaxinolu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34702d2a-deb4-45c5-aab4-38f96de69c0e/16132114992.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6573d363-81c3-474e-96e4-f599ec9f6f20/german_essential_oils_desk_reference_6th_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd87b299-806d-4c88-bfe0-d91e145adb9e/35183315012.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_off00013349.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13349 5196 bytes
SHA-256: 5291d487e6923ca94e453fa6e9c8f74b2c5f927cf46a6f092c09ba32c199f49c
font_01_sfnt_off00014501.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14501 11104 bytes
SHA-256: 5d5f1765cda289403cafcc0e6ede55a5eb31c22a80823185253a7c6245822bcf

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