Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9444f9fd7907f3d…

MALICIOUS

PDF

79.5 KB Created: 2021-03-03 12:31:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: af99710fb0d568cbe0437532b2a6c620 SHA-1: d0910c23d410ac49e791ae54dd00dd7c2db349df SHA-256: c9444f9fd7907f3df9708d1b58c10e2c7ba2fe583dba44a4c3b915389f37a8c3
96 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 ClamAV as Pdf.Phishing.Trojan. The ML classifier also strongly indicated maliciousness. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics suggest this PDF is designed to redirect users to malicious content, likely for phishing or malware distribution.

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://kuzutuzo.ru/strik?utm_term=how+to+insert+chicago+style+citation+in+word
    • http://wikowezenitezo.medianewsonline.com/31194438161.pdf
    • http://meetly.space/144464562162qxax.pdf
    • http://pimifawimonidij.mywebcommunity.org/6.integrate_int_sin2xcos2x_dx.pdf
    • https://cdn.sqhk.co/gevagedubop/E9hgjgR/pico_rivera_sports_arena_covid_testing.pdf
    • http://zumewidife.mygamesonline.org/do_you_hold_your_breast_while_breastfeeding.pdf
    • https://pulapafux.weebly.com/uploads/1/3/0/8/130874232/32afb1c.pdf
    • https://mumasibomogavap.weebly.com/uploads/1/3/1/0/131070301/cdbc009a800b8a.pdf
    • https://bipipabogudas.weebly.com/uploads/1/3/1/1/131164499/zedakati.pdf
    • http://youtube-subscribes.com/manual_ansys_workbench_espaolumrzt.pdf
    • http://beviluxenumiliv.mywebcommunity.org/bosch_silence_plus_46_dba.pdf
    • https://cdn.sqhk.co/jotenitix/khiM2ow/50440904964.pdf
    • http://komaxinatobofe.medianewsonline.com/74598271796.pdf
    • https://cdn.sqhk.co/lokijuzim/uqhbij0/adidas_yeezy_boost_700_v2_hospital_blue.pdf
    • http://lokubakodo.getenjoyment.net/35976439339.pdf
    • http://kolagozisil.mywebcommunity.org/16th_century_italian_peasant_clothing.pdf
    • http://copyrightshelpcenter.com/12145967636wemuc.pdf
    • https://tinonerapize.weebly.com/uploads/1/3/5/3/135349756/981027.pdf
    • http://nosatines.mypressonline.com/sharp_aquos_quattron_will_not_turn_on.pdf
    • http://pazadixokumox.sportsontheweb.net/89115737562.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed13.bin
27d571c229b44da1e383eb4b5a38b700ed14ae32c63f0a1756349853a7c30400
pdf-font-stream PDF embedded font (sfnt) at offset 0xED13 5144 bytes
font_01_sfnt_off0000fe97.bin
d40ace5271615c579f81246a625856868dab7e616b072c04e2d3147187906938
pdf-font-stream PDF embedded font (sfnt) at offset 0xFE97 10436 bytes
font_02_sfnt_off00012206.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34
pdf-font-stream PDF embedded font (sfnt) at offset 0x12206 4324 bytes