Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6bcc9f27a2c3d95…

MALICIOUS

PDF

203.4 KB Created: 2021-05-25 10:55:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: f64c0a54bfc92836f395e464837df237 SHA-1: cf32b14643c16031c81483cecb23fd38a059f304 SHA-256: b6bcc9f27a2c3d95a6bed6f33fd7e0dcc874d4a74fb8ea0272b3bd7a0ce8f257
104 Risk Score

Malware Insights

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

The file is a PDF document identified as malicious by ML classifiers and ClamAV. It contains an embedded URL pointing to a suspicious domain, likely intended to host or redirect to a malicious payload. The document body, though heavily obfuscated, suggests a lure related to 'soil formation worksheet answer key pdf', combined with a heuristic indicating a 'download button' lure, reinforcing the phishing or social engineering aspect.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://golowaki.ru/strik?utm_term=soil+formation+worksheet+answer+key+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4389599/normal_6048918f67211.pdfIn PDF document text
    • https://pebajubidu.weebly.com/uploads/1/3/1/3/131383648/pajolidivuj_semufu_pufigituda.pdfIn PDF document text
    • https://fugakesuj.weebly.com/uploads/1/3/0/7/130776648/cc530ad55a0f63.pdfIn PDF document text
    • https://voderixata.weebly.com/uploads/1/3/4/2/134266977/votemiwiwujenuk_bodogegef_totarerusekaf_kagagimubeziti.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369638/normal_5fe6ce80613bf.pdfIn PDF document text
    • https://zanokelalugabu.weebly.com/uploads/1/3/5/3/135315143/5891748.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368225/normal_600d29cf51a63.pdfIn PDF document text
    • https://fumewalifo.weebly.com/uploads/1/3/4/8/134884483/6485110.pdfIn PDF document text
    • https://lazumuron.weebly.com/uploads/1/3/4/8/134863931/jedixonup.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460725/normal_5fe017c5d5930.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465556/normal_602f0fc01823c.pdfIn PDF document text
    • https://xaweregosakub.weebly.com/uploads/1/3/1/4/131407668/9197f73.pdfIn PDF document text
    • https://luzijegeze.weebly.com/uploads/1/3/4/0/134040843/cc48a3e9dfd75c.pdfIn PDF document text
    • https://nojefawagalubab.weebly.com/uploads/1/3/4/2/134266261/gelefajo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/mexesazaxasa/wojafakisopu.pdfIn PDF document text
    • https://s3.amazonaws.com/rumezo/all_star_cricket_2019_mod_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/lososimap/50215015626.pdfIn PDF document text
    • https://s3.amazonaws.com/wudibirewuduto/84392790663.pdfIn PDF document text
    • https://s3.amazonaws.com/sugosubexez/gapanite.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_off0002e16f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E16F 5644 bytes
SHA-256: 6854ffda97dc5ca792061c0057e446017a950e23bac290c8332a1697d4e48d34
font_01_sfnt_off0002f48a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F48A 12200 bytes
SHA-256: 7978c63f0c3154f6974ace66c76149c8506652882ae94e20b406f207910e97f9

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