Malicious PDF — malware analysis report

Static analysis result for SHA-256 c35c224c0ff5257b…

MALICIOUS

PDF

81.9 KB Created: 2021-03-19 08:29:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9b017a0bfe2a8f8dcdfe6d71f60ec826 SHA-1: 7e9185cb68e51761ed0ca61e67cc55fd687e67af SHA-256: c35c224c0ff5257b440b473a738e09fdc3335aad93ec7bd83f70564a7a120cad
104 Risk Score

Malware Insights

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

The PDF contains embedded URLs and heuristic firings indicating it is a phishing lure, specifically mentioning invoice or payment language. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were directly extracted, the presence of external URLs points to a likely attempt to download a secondary payload or redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://botokaw.ru/123?utm_term=act+dates+2019-+20+pdf
    • https://cdn.sqhk.co/gabisolovima/Ojjwgfb/street_of_rage_4_mod_apk.pdf
    • http://wimixolumow.iblogger.org/fun_printable_math_worksheets_for_1st_graders.pdf
    • http://sapinatuligoro.22web.org/38126784105.pdf
    • https://cdn.sqhk.co/sejixikerut/Qa57Qij/woduwopumujuxivusojo.pdf
    • https://cdn.sqhk.co/xedomobedusi/aibdciI/93428793.pdf
    • https://cdn.sqhk.co/pulizojiwim/pxGgdia/zapisevagaw.pdf
    • http://gubuzikutavijuf.iblogger.org/bozojoxu.pdf
    • https://cdn.sqhk.co/wifinalimow/djijhgj/nulamexowub.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/radubozufiwo/academic_vocabulary_toolkit.pdf
    • https://9c43cb74-45e3-47de-9527-fda2e8336169.filesusr.com/ugd/af0aa9_21478b8cbbc14206a61ba896c733b730.pdf?index=true
    • http://mimewimirul.rf.gd/34339309760.pdf
    • http://maguzudag.epizy.com/nta_net_exam_june_2019_answer_key.pdf
    • https://cf2e1f24-e5f1-4289-9567-3affce9c164e.filesusr.com/ugd/a4ea6c_4871f4df3fd74edca91bd4e308914a40.pdf?index=true
    • https://s3.amazonaws.com/zategafozasiru/85009757702.pdf
    • https://uploads.strikinglycdn.com/files/c5402025-53eb-448f-9e66-4ff0050950f6/tiluvubirumifoganozup.pdf
    • https://s3.amazonaws.com/fomudebipefasu/51360820763.pdf
    • https://s3.amazonaws.com/dipafuxe/apeman_trail_camera_user_guide.pdf
    • https://uploads.strikinglycdn.com/files/2a205f48-4941-44d8-9244-7f5015d2ba10/how_to_make_creamy_cajun_butter_sauce_for_seafood.pdf
    • https://uploads.strikinglycdn.com/files/74dbab4a-d118-4ddf-9a10-895459c3cad0/2636199203.pdf
    • https://1eba3b37-3dce-45e8-aa15-e51a58efc0fe.filesusr.com/ugd/89e37c_1c44b77a16fd482680b7aea40b36379e.pdf?index=true
    • https://uploads.strikinglycdn.com/files/11a8b82f-fecb-40ef-b844-3fb7c208ec25/telawigarabot.pdf
    • https://9005a25f-7293-4a73-bb0f-bc58e8c16807.filesusr.com/ugd/e3834b_ca187e5da3e848669aee376a6b7b773e.pdf?index=true
    • https://uploads.strikinglycdn.com/files/843c39ad-20f8-45d0-849c-96eac3561476/94017651185.pdf
    • https://39c1d623-eccb-4af0-a86a-15328a2d61f9.filesusr.com/ugd/3cb6cb_343c1f4212954aabbf98e182c57e6fa1.pdf?index=true
    • https://s3.amazonaws.com/sedimeraxufi/maxalosojano.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_off000100b1.bin
3126ac511bfc7bc132ec446db6507603d548f1b4dfcf50308b64501e79be6dbc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x100B1 5524 bytes
font_01_sfnt_off0001139b.bin
9deba717c648b9a1e745ad472f4b0c1a7c556315b257906927fdcb790111e332		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1139B 11476 bytes

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