Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d0f5cd656ccd559…

MALICIOUS

PDF

79.6 KB Created: 2021-03-19 17:31:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 865ad53bc6cda738bc136e7c7ea001b1 SHA-1: 78dfde9bf67d206663e6dce4e5071a9318cfcc26 SHA-256: 8d0f5cd656ccd5599ca9c9dcc6422bd22e9e15453fe178bd39b8975dbe2a6909
96 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains an embedded URI pointing to 'https://maypoin.ru/wix?keyword=shark+diagram+simple', which is likely part of the phishing lure. The document body is heavily obfuscated, but the presence of external URIs and the overall detection suggest an attempt to redirect users to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://maypoin.ru/wix?keyword=shark+diagram+simple
    • https://cdn-cms.f-static.net/uploads/4369161/normal_600c0602a5920.pdf
    • http://blekrossi.ru/67129912196kwjj7.pdf
    • https://static.s123-cdn-static.com/uploads/4374520/normal_6007ff78e01a6.pdf
    • https://static.s123-cdn-static.com/uploads/4380382/normal_5ff09595901d8.pdf
    • https://cdn-cms.f-static.net/uploads/4473375/normal_5fda24e01cf43.pdf
    • https://cdn-cms.f-static.net/uploads/4417986/normal_6016774d6136b.pdf
    • https://cdn-cms.f-static.net/uploads/4383561/normal_5fe9b0192fd37.pdf
    • http://korecos.ru/dutorotebegonutitobiki61rq.pdf
    • https://cdn-cms.f-static.net/uploads/4467573/normal_604cd522bb87c.pdf
    • https://cdn.sqhk.co/jeforije/XQEChjP/gold_farming_guide_wow_8._3.pdf
    • https://cdn.sqhk.co/vabilafibalu/ibJA6e0/88397495696.pdf
    • http://sajezexutumesu.iblogger.org/julitake.pdf
    • http://vuvepexuja.22web.org/landing_page_wordpress_templates_free.pdf
    • https://static.s123-cdn-static.com/uploads/4531523/normal_5fcaaa13c25ef.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/3320f3b2-65ec-4463-a573-f7765865eb90/america_history_and_life.pdf
    • https://uploads.strikinglycdn.com/files/09e195d1-04b9-4123-9ccd-9ae442411739/wapifumuvexenopalogimima.pdf
    • http://mimiwuzoxul.epizy.com/blue_eyes_video_song_videoming.pdf
    • http://feliruxitekul.epizy.com/tapegepasilev.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e568.bin
79bc40f1dcde5af0197fcd634738b17d54c91059b671cabbc6eb1615e425cac3
pdf-font-stream PDF embedded font (sfnt) at offset 0xE568 5540 bytes
font_01_sfnt_off0000f80f.bin
f6b9d0000c9cf76f86207d562dd37309d345590286163f751268658a2eed0dc3
pdf-font-stream PDF embedded font (sfnt) at offset 0xF80F 10756 bytes
font_02_sfnt_off00011ce3.bin
d1a84ba8f0e4a827a048d387db8dd5dae3538f1c7e72415b16af587a9947cdc7
pdf-font-stream PDF embedded font (sfnt) at offset 0x11CE3 16060 bytes