Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a10da08fe7a918f…

MALICIOUS

PDF

75.9 KB Created: 2021-03-19 05:52:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: f7cbb35211d3751747f812fb5ebbe796 SHA-1: 6c918f9941aa179a667adfeb14f01bd5fc91a082 SHA-256: 9a10da08fe7a918fef6e104c9a5e44894fa69a51bde9e77371c6115b5d0318a8
126 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, identified by heuristics as a link farm on disposable hosting. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing trojan. The embedded URL likely serves as a lure to a phishing or malware distribution site.

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
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://mezovuduw.ru/wix?keyword=carnation+good+start+infant+formula PDF link annotation
    • https://segukikiregitep.weebly.com/uploads/1/3/1/8/131856439/soxadivudodutelagep.pdfIn PDF document text
    • https://zoninezazazi.weebly.com/uploads/1/3/1/0/131070362/7430241.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://77bac38d-831a-46d6-8f22-d7743fcadc58.filesusr.com/ugd/5b9a87_fad7b3156fa346bb85134a03a1c7d4b9.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wefadep/64649378919.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac800449-5bd9-4b88-bf5d-5572d0e2bbf5/zeboworadurop.pdfIn PDF document text
    • https://db7841a4-af10-4990-a2be-f084cd4acbf6.filesusr.com/ugd/e3c460_517c4a10206c47e88e95a81fab39a9f0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pobixedele/nutcracker_suite_piano.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b60e52d5-d481-406a-a6d2-f0f91dec0eee/best_way_to_learn_general_chemistry.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d77ed1d7-7baa-4e52-baed-c23158928300/95460010980.pdfIn PDF document text
    • https://367e539a-c541-4439-991c-4bf2bef2aa7a.filesusr.com/ugd/77d535_b6edeaa843c149f2a82aa27b37ec8725.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac062fab-59d9-4269-ae51-0e9d0d0d330f/adobe_photoshop_cs6_tutorial_in_hindi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce1d0f07-508e-4f09-89f0-f8fc4f1e8c3b/how_to_set_up_comcast_xr2_remote.pdfIn PDF document text
    • https://044ec7df-721b-4788-b209-87474a3fcb06.filesusr.com/ugd/60ffa2_49d51abb1f8a42be98e81b7762a780cc.pdf?index=trueIn PDF document text
    • https://1b53f64c-3596-40ff-86ea-95cec8902569.filesusr.com/ugd/838e7e_08ef3f7caa6d406b9a8c33b773a75116.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pevarijidasalop/guy_debord_society_of_the_spectacle_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4997bd8a-5482-4c92-8a41-e2e1726ac30e/povusobapoxepoguvapiw.pdfIn PDF document text
    • https://0f926834-650c-4d5a-b53c-ad60ae412ccc.filesusr.com/ugd/6a44d8_ddbc84746d8a4283b20fd2916d336f24.pdf?index=trueIn 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_off0000e937.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE937 5132 bytes
SHA-256: b659fb75c0cdbfdb2b4e8097c7061c7fd86cc5963939a44973455bcd6aded359
font_01_sfnt_off0000fa96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA96 11640 bytes
SHA-256: 3b09c168f9f8f12de02960918d0f9ae61c1787a2773a2227775e6735e0aa3dac

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