Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a5055cf96e4a434…

MALICIOUS

PDF

83.6 KB Created: 2021-02-05 00:08:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: a49222961682a94901f18e248d4b8bf8 SHA-1: c262f6ca69c840627f992dd674d02024a2716b71 SHA-256: 4a5055cf96e4a43426508ae00b63d71a6a80f582bcdd06e559f4c0c13a72caca
96 Risk Score

Malware Insights

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

The file is a PDF document flagged by ClamAV as a phishing trojan. It contains an embedded URI pointing to 'bologen.ru', which is likely a malicious domain used for phishing or malware distribution. The document body, though heavily obfuscated, suggests a lure related to 'Assertiveness training worksheets', which is a common tactic to entice users to click on malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://bologen.ru/123?utm_term=assertiveness+training+worksheets PDF link annotation
    • https://cdn.sqhk.co/fefamuve/dhaShgr/hurricane_superhero_wind_tornado_vegas_mafia_mod_download.pdfIn PDF document text
    • http://songkfrk.site/41575510223tkgm8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495841/normal_5fd61bd652d16.pdfIn PDF document text
    • https://cdn.sqhk.co/lanumakefu/dgiidhc/goxirodeg.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476274/normal_5ffebe2f32c23.pdfIn PDF document text
    • http://cmbespaceclient.xyz/download_nba_2k17_for_free_ios62yop.pdfIn PDF document text
    • https://cdn.sqhk.co/kowetitemaro/hZjiVja/brawl_stars_merchandise_shop.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376852/normal_5fe31cd206fd9.pdfIn PDF document text
    • https://cdn.sqhk.co/jutigurotow/cjgZTie/92067807617.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426971/normal_5ff141d676781.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4423715/normal_5ff2177aa8536.pdfIn PDF document text
    • http://dle-tpl.site/business_plan_sample_docgxzq4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501660/normal_6010a60b01cdb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379841/normal_5ff6a69ee162c.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
    • https://s3.amazonaws.com/babetafaperaxov/ipcc_special_report_ocean_cryosphere.pdfIn PDF document text
    • https://s3.amazonaws.com/tinajabizoreguf/zeked.pdfIn PDF document text
    • https://s3.amazonaws.com/rakabexozu/vekutoke.pdfIn PDF document text
    • https://s3.amazonaws.com/pasutiz/baby_background_psd_free.pdfIn PDF document text
    • https://s3.amazonaws.com/tigewibejageju/32708299413.pdfIn PDF document text
    • https://s3.amazonaws.com/kozewuposoridil/clases_de_actos_administrativos.pdfIn PDF document text
    • https://s3.amazonaws.com/fonazuzixagizir/nakabob.pdfIn PDF document text
    • https://s3.amazonaws.com/liluvad/51335584370.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e8aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8AA 4908 bytes
SHA-256: a07afee4bd78cbf92533e2301d191bc29922c02d39663e33e91a57523ecb5441
font_01_sfnt_off0000f960.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF960 10452 bytes
SHA-256: 79848fc6d6314ea7654dd52d7dcf84441f8c8f4a0f5ef383ad5c4a2fd413360c
font_02_sfnt_off00011d58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D58 16060 bytes
SHA-256: 5b0d2701ab39d2f69c66d7d16c60d8db0b323aa0832947137e757b5401d27330
font_03_sfnt_off000131f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131F0 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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