Malicious PDF — malware analysis report

Static analysis result for SHA-256 821210740bd7b0ee…

MALICIOUS

PDF

98.4 KB Created: 2021-04-27 01:58:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c9ba743e4757bb984d0271c5e28447af SHA-1: f00febce51d9a8996f59424e302eea48f51c4dc8 SHA-256: 821210740bd7b0ee5073a9c0cfd3c17ed3ce6fec327f73773342704012c864f4
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that is likely part of a phishing or malware distribution scheme, as indicated by the ClamAV detection and ML classifier. The document body, though heavily obfuscated, appears to be related to a search query, suggesting a lure to trick users into clicking the malicious link. No scripts were extracted, but the presence of external URIs points towards a malicious intent to redirect the user.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://ponafet.ru/strik?utm_term=whirlpool+quiet+partner+iii+filter
    • http://dojemop.mywebcommunity.org/jigamekobizijem.pdf
    • http://frasqen.online/giteterowetikukodobe4e6ly.pdf
    • http://mopowataxix.medianewsonline.com/dotugutodojizexi.pdf
    • http://jatudoz.getenjoyment.net/60130889665.pdf
    • http://noverst.xyz/us_army_dress_uniforms_over_the_yearsw0ube.pdf
    • http://rixanemusijod.mywebcommunity.org/sumuku.pdf
    • http://gifinibufenatar.medianewsonline.com/jivajibugujifakoxerezez.pdf
    • http://exampl1214.com/cardiospermum_halicacabum_uses144yz.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://141ebdc9-a3c9-4c6d-b8f9-366dbf139dec.filesusr.com/ugd/46bfb0_becc1f090a4f40e5910e01db24352c91.pdf?index=true
    • https://f1e11ea9-a931-46ad-af30-391325c877dd.filesusr.com/ugd/423518_835777eb34794b0b90624623c5a81059.pdf?index=true
    • https://uploads.strikinglycdn.com/files/8538c46c-744d-46c9-a0fe-8005c2e73905/2016_honda_trx_500_service_manual_free_download.pdf
    • https://uploads.strikinglycdn.com/files/05996940-4716-4af2-ba4b-0d733bf8788a/46002859922.pdf
    • http://bugenerefajujus.atwebpages.com/adobe_acrobat_to_ms_word_converter.pdf
    • https://d115d978-d96a-40c8-9764-5d959708fc35.filesusr.com/ugd/436160_2725cc93a83c4063a473f4d4bf46635c.pdf?index=true
    • http://xowobovu.myartsonline.com/explain_how_to_use_the_standard_normal_table_to_find_the_probability.pdf
    • https://1423d76f-a56f-4481-bf87-726e17039346.filesusr.com/ugd/14aee2_7972cd98568b401c82265ac83a2b02c3.pdf?index=true
    • https://493f174a-a540-412c-bacb-e5b7b26cbfcf.filesusr.com/ugd/95bb70_aacb8987680f4747a69977b7f80a705a.pdf?index=true
    • http://nisetekotixob.myartsonline.com/sewing_machine_patterns_for_beginners_uk.pdf
    • https://uploads.strikinglycdn.com/files/24603a86-906a-4d2d-9016-7d8e72ce70ba/92896178402.pdf
    • https://6c49ff76-e13b-46da-8354-2e633d56f736.filesusr.com/ugd/211c2d_9c0c9e3b290143988eeb5c4ff6ceb5a7.pdf?index=true
    • https://uploads.strikinglycdn.com/files/c58539ae-4d00-4639-8e93-43d1620e6446/1455922128.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000140ea.bin
f4e30f5da199b28f9fab67310c9d60f7bd834aeb328f45f6b374cd4b7e4d4c23		 pdf-font-stream PDF embedded font (sfnt) at offset 0x140EA 4948 bytes
font_01_sfnt_off000151cc.bin
85afdaee89a83486fb8dcb08d6e5806969639eba49124b8eb1778183e09c41d5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x151CC 12576 bytes

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