Malicious PDF — malware analysis report

Static analysis result for SHA-256 c58f5b4c5f9ea0b0…

MALICIOUS

PDF

72.8 KB Created: 2021-03-01 05:38:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: f60fae539ee663b4882d60b67d3d14ed SHA-1: 6dfa3efaba6202c149ee02f02e6b3795263f395c SHA-256: c58f5b4c5f9ea0b078fbee9b65c1e553e8daa656a13fa89996e4c7f02fc426f9
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The document contains a large number of external links, characteristic of a link farm designed to distribute malicious content. The primary URL, 'https://leonvi.ru/wix?keyword=parabola+worksheet+answers', suggests a lure to trick users into clicking through to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://leonvi.ru/wix?keyword=parabola+worksheet+answers PDF link annotation
    • https://cdn.sqhk.co/jafetegupam/thacuge/epson_iprint_fur_windows_10.pdfIn PDF document text
    • https://cdn.sqhk.co/totafeta/jjNbFqX/beriluna.pdfIn PDF document text
    • https://cdn.sqhk.co/remimidotomi/ih1P09A/32568637168.pdfIn PDF document text
    • https://cdn.sqhk.co/tokafumotebi/ovih6Wn/translate_on_screen_mod_pro_apk_download.pdfIn PDF document text
    • https://cdn.sqhk.co/kegufamop/eqLrlid/80883237868.pdfIn PDF document text
    • https://cdn.sqhk.co/zegareguw/3Jib4bX/98214004647.pdfIn PDF document text
    • https://gowobokibisalo.weebly.com/uploads/1/3/0/9/130969305/liribiwefakab_mimage_dukomupepimetuw_lusolasuz.pdfIn PDF document text
    • https://nurigefisigutip.weebly.com/uploads/1/3/4/6/134628418/sogipogasigosi_bilupo_jafivokuni.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474992/normal_5fe42ad59501a.pdfIn PDF document text
    • https://werevofapopaja.weebly.com/uploads/1/3/4/4/134492388/xazizobejipemigo.pdfIn PDF document text
    • https://cdn.sqhk.co/rapawaferew/5hdhaha/guilty_gear_strive_character_select_screen.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://waraxiv.rf.gd/mutijis.pdfIn PDF document text
    • http://piwodapasolok.rf.gd/16359708976.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e251.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE251 5072 bytes
SHA-256: d347c2e3d938557538904a628ac9dd0efb5e1ed2872ff8a0665640bba87764fc
font_01_sfnt_off0000f397.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF397 10348 bytes
SHA-256: 907470371237b2e0a5416fbda4e8602880a4fcb46685aa786da60183f291d181

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