Malicious PDF — malware analysis report

Static analysis result for SHA-256 2624c858798da5f3…

MALICIOUS

PDF

73.8 KB Created: 2021-04-04 03:07:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 18aaf6f566033829b5cf69c4fcc63a32 SHA-1: adc98d515cebe09ea54c4ccf64c750c25425e8d0 SHA-256: 2624c858798da5f39452a02f43c9515fa8b23c2840a25365666a0cb53f0dc42b
96 Risk Score

Malware Insights

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

The file is a PDF containing obfuscated content and an embedded URI pointing to a suspicious domain. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The presence of an external URI suggests an attempt to redirect the user to a malicious site, potentially for credential harvesting or further payload 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://xezojetit.ru/strik?utm_term=mitsubishi+mr+slim+inverter+not+cooling
    • http://fezelegafefuv.mywebcommunity.org/muwirosikakijuzifet.pdf
    • https://cdn-cms.f-static.net/uploads/4488809/normal_604d2ad0d9c55.pdf
    • https://cdn-cms.f-static.net/uploads/4369305/normal_6064d77d37b63.pdf
    • https://cdn.sqhk.co/fipudiroj/HXjj9QW/crossword_answer_for_be_contingent.pdf
    • https://cdn-cms.f-static.net/uploads/4462065/normal_60563a5a18a8a.pdf
    • http://pexarinolal.mypressonline.com/gepijivoperubedat.pdf
    • https://cdn-cms.f-static.net/uploads/4462075/normal_605449997e7ed.pdf
    • http://nekazupafo.mygamesonline.org/16159772353.pdf
    • https://cdn.sqhk.co/manigonodapu/IgjcLP3/motorcycle_wallpaper_4k_phone.pdf
    • https://cdn.sqhk.co/nefowumik/1ja2jhN/zobedulanaz.pdf
    • https://cdn.sqhk.co/mumeriretepi/FjaBohe/sekitavizoluzozamed.pdf
    • http://ruxenawuxovogu.getenjoyment.net/65973814740.pdf
    • https://cdn-cms.f-static.net/uploads/4490974/normal_601f577d67ed1.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cee4a208-09ac-40e0-983f-4c2cc776acbe.filesusr.com/ugd/5ed537_2f15e0e2ca104cddb4b8831e7080b04c.pdf?index=true
    • https://d451e762-8e00-4155-9971-9512d28d2528.filesusr.com/ugd/b52961_245b396882cc4c2a99a428d408f18621.pdf?index=true
    • https://1fc3e790-19e1-43b7-bae7-d09a953f51fe.filesusr.com/ugd/2c608b_74981296600f457fa12e8bd7182ad94a.pdf?index=true
    • https://b4095e1f-5e43-4c35-8b28-ff0c3185c247.filesusr.com/ugd/9cc3de_461769597f52459ba973b0ba85428e39.pdf?index=true
    • https://923a8ca3-316b-4844-b38f-9bc955ad4852.filesusr.com/ugd/312e0e_00acad5d2fad4a33b6528f161bc3c25e.pdf?index=true
    • https://3e1ae61b-6b68-46dc-8a90-d1c7a5b9f91c.filesusr.com/ugd/b8bbd7_127cdd89573d47469c1f2920b79f9a75.pdf?index=true
    • https://ebba3e40-d49f-4cc8-b137-373bb1124918.filesusr.com/ugd/384ea4_31400d5c8f8d48ff900b1deac5cf04c4.pdf?index=true
    • https://f608bf75-187c-4b28-9621-af925c05c2b6.filesusr.com/ugd/05e3ad_57a4f00c1d074122ac9ba1bd92a25532.pdf?index=true
    • http://pakapenabu.atwebpages.com/cellule_animale_et_vgtale_exercice.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_off0000e42f.bin
af3eebfd61313134ce6bf5bc52544be6b36148f5e8b459aa1ef529086be5764f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE42F 5208 bytes
font_01_sfnt_off0000f5d1.bin
86c81436ea84a5167bf689f64c3f8c6211829f01b8644d1307e09a809306c935		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF5D1 10568 bytes

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