Malicious PDF — malware analysis report

Static analysis result for SHA-256 f73d5974baa46987…

MALICIOUS

PDF

76.6 KB Created: 2021-03-06 21:42:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4e39541cd4a86ad5de8b17fff74c4059 SHA-1: 44c92e991dd7f3f15becdf50789777690d8577a2 SHA-256: f73d5974baa46987ba0f25ace0e74158f5f063685a3bd175ebfc67cabc1b5e82
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URI pointing to a suspicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The ML classifier also flagged this PDF with high confidence. The document body is heavily obfuscated, but the presence of external URIs suggests an attempt to redirect the user to a malicious site for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://resalured.ru/123?utm_term=everyday+use+characters+descriptions
    • https://sovanomi.weebly.com/uploads/1/3/5/3/135337195/5f8c92eeaef4e.pdf
    • https://jodavetofa.weebly.com/uploads/1/3/1/4/131438562/libitonibuwa-fabemap.pdf
    • https://cdn.sqhk.co/mopewedote/heiGij4/lufumebivezamolopef.pdf
    • http://pakepudowo.22web.org/97387613050.pdf
    • http://smilex.club/2006_chevy_ssr_manual_transmissionpggaz.pdf
    • https://lereviripos.weebly.com/uploads/1/3/4/6/134663640/790f1dc.pdf
    • https://static.s123-cdn-static.com/uploads/4412761/normal_5fe1b3855a356.pdf
    • http://filanion.online/wemekepa237r3.pdf
    • http://rupukimonedekij.22web.org/lg_gs290_unlock_done.pdf
    • http://subfamjtii.site/chrome_extension_react_performanceb8tq7.pdf
    • https://fomoxizukewoviw.weebly.com/uploads/1/3/0/7/130739072/9597432.pdf
    • https://cdn.sqhk.co/rasidepad/hhojgdf/23570979577.pdf
    • https://cdn.sqhk.co/bepeguvovori/ib0haip/90661796198.pdf
    • https://static.s123-cdn-static.com/uploads/4369328/normal_5feb35aea06b5.pdf
    • https://cdn.sqhk.co/motulobugaji/eL1Y7hi/patuzosuluxupirizonina.pdf
    • https://cdn-cms.f-static.net/uploads/4476294/normal_5fe6495bcef77.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://bupujipa.epizy.com/beginners_guide_to_ketogenic_diet.pdf
    • http://joxupabazifo.rf.gd/crioterapia_articulo.pdf
    • http://wufizomofoduzin.rf.gd/wegizolajerinizesagelutix.pdf
    • http://nebopujewewap.rf.gd/abbasid_caliphate.pdf
    • http://tupomomi.rf.gd/decorative_knot_tying_guide.pdf
    • http://lirufuti.epizy.com/microsoft_word_2016_table_of_contents_tutorial.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_off0000f07a.bin
971e5751a99c9d5ce077d9c4882abe2d368ff110417540de086b2d44ce973b70
pdf-font-stream PDF embedded font (sfnt) at offset 0xF07A 5248 bytes
font_01_sfnt_off00010262.bin
a3449e01330673184f1fe8efc22d84709f0b8dd0878f98f1ae7a9720b0e40785
pdf-font-stream PDF embedded font (sfnt) at offset 0x10262 10224 bytes