Malicious PDF — malware analysis report

Static analysis result for SHA-256 152d630839418b50…

MALICIOUS

PDF

74.2 KB Created: 2021-04-06 04:29:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 85f85e28739d043da4d7c5e68fa45695 SHA-1: d1e643da536c00868e26df7108ad653d81d1150c SHA-256: 152d630839418b509d9ba9f4f6a72fc975011201b0f162cd7d81566058c5d7d8
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically identified as a phishing trojan. It contains an embedded URI pointing to 'crophysi.ru', which is likely part of a phishing campaign. The document body, though heavily obfuscated, contains references to 'wkhtmltopdf' and 'gba roms apkpure', suggesting a lure related to software or game downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://crophysi.ru/wix?keyword=gba+roms+apkpure PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4469143/normal_606a191f9b0b2.pdfIn PDF document text
    • http://ranixug.iblogger.org/83604062335.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4499282/normal_600178154242a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365656/normal_5ff950123208c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421966/normal_5fd7991cce901.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488566/normal_603abe648bbab.pdfIn PDF document text
    • http://kapubasezo.iblogger.org/bitrix24_crm_reports.pdfIn PDF document text
    • http://zatakifi.22web.org/megexapar.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://nisogifamesada.epizy.com/basic_disaster_life_support_manual.pdfIn PDF document text
    • http://lurozakilaxa.rf.gd/kovetutepek.pdfIn PDF document text
    • http://dixukatujawuja.epizy.com/bestiario_pathfinder.pdfIn PDF document text
    • https://s3.amazonaws.com/nowokil/49045403284.pdfIn PDF document text
    • http://kelawezup.rf.gd/38989989330.pdfIn PDF document text
    • https://s3.amazonaws.com/fujadabez/stephen_kings_it_streaming.pdfIn PDF document text
    • http://jupetovujek.epizy.com/54036880830.pdfIn PDF document text
    • https://s3.amazonaws.com/resisuna/31265823638.pdfIn PDF document text
    • http://dumatefofexulen.epizy.com/what_are_the_four_stages_of_mitosis_cells.pdfIn PDF document text
    • https://s3.amazonaws.com/kifutizijebuj/790159222.pdfIn PDF document text
    • https://s3.amazonaws.com/serogajugomiji/genie_promax_pmx500ic_b_parts.pdfIn PDF document text
    • http://forafunivotefu.rf.gd/kitchenaid_mini_stand_mixer_matte_white.pdfIn PDF document text
    • https://s3.amazonaws.com/kokesatodixon/plant_and_animal_cell_functions_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/varolexexus/91653709983.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d91d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD91D 4816 bytes
SHA-256: e2d048d8d3d7be4ef54748f268af80ae1bd4c51c5cc9bd6e881032737642a885
font_01_sfnt_off0000e980.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE980 10588 bytes
SHA-256: da6ed4a453caa31b1e0cee468b3b0ae72a27a3e5c0d7fb14e68fb44aef0fc37b
font_02_sfnt_off00010d99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D99 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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