Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fa0858b6484c089…

MALICIOUS

PDF

111.6 KB Created: 2021-05-11 10:30:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 616075eac8638e05896178aa6c3ccb74 SHA-1: c258496d5175c840a80c671c2075721b349dc6e1 SHA-256: 6fa0858b6484c0893757f3aae7925a9b840ff8dd0cef3b31c63387d9b26fce13
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'nipisod.ru', which is likely used to redirect the user to a phishing or malware distribution site. The document body, though heavily obfuscated, contains text related to an audiobook, suggesting a lure to entice users to click the malicious link.

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://nipisod.ru/strik?utm_term=day+by+day+armageddon+audiobook
    • http://table-wait.com/29635137925zy9f8.pdf
    • https://cdn.sqhk.co/vedimurami/5Ojghfv/how_many_free_kick_goals_ronaldo_has.pdf
    • http://nebo-baikala.ru/rixavajunenigujoguwudefy21w.pdf
    • https://static.s123-cdn-static.com/uploads/4386091/normal_5fed0da7a05a6.pdf
    • https://cdn.sqhk.co/jilebodetifa/ijhcygg/80742097267.pdf
    • http://wiboratiraveguw.mygamesonline.org/11947304622.pdf
    • http://roxedizusugu.mywebcommunity.org/85783794538.pdf
    • https://cdn.sqhk.co/lojibuwe/dhfSiaF/dog_balloon_artist.pdf
    • https://cdn.sqhk.co/vodadavubex/hbekiiX/housecall_providers_portland_or.pdf
    • https://cdn.sqhk.co/luwesefizi/Djdhhjd/the_last_of_us_wallpaper_hd_android.pdf
    • http://changepass.online/ukulele_strumming_patterns_4_4d4fg6.pdf
    • http://healthyforczechrepublic.site/sijeserenu4mf8j.pdf
    • http://pochta-24.cc/sopogidulefanamufijuzebcpdd2.pdf
    • http://silkhfig.bid/jitiwibonubttv.pdf
    • https://cdn-cms.f-static.net/uploads/4392862/normal_6045bb4d1cf7a.pdf
    • http://fufejezonodim.mywebcommunity.org/the_book_thief_chapter_13_summary.pdf
    • http://nosinoski.shop/sofewumezagadelipijugs08g.pdf
    • http://about-central.com/75313527200lulb7.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://pelebirepopo.onlinewebshop.net/mifururopapawikabu.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_off000178ec.bin
1747920454721f0aa918abbd2c951cc5f5dbbe5c8e9f8fd4d754b837508e66fe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x178EC 5240 bytes
font_01_sfnt_off00018abe.bin
75acf274a3aa863d7740bc07269de8a075cc9009e26fd6d21fa96ffde5860e14		 pdf-font-stream PDF embedded font (sfnt) at offset 0x18ABE 10668 bytes

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