Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c1168c4aeeb269b…

MALICIOUS

PDF

78.3 KB Created: 2021-03-21 09:32:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 18e38db8056ed189bac2d0e883a2df23 SHA-1: 75d618cc1d7ff464ebd188b66d6d8b715e56ad82 SHA-256: 3c1168c4aeeb269b5b4b5e816559dfea851effc4137e6b46fd91d1cfc4994d66
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://seumenha.ru/strik?utm_term=troy+bilt+weed+wacker+carburetor+adjustment PDF link annotation
    • http://copyright-help-center.com/how_to_calibrate_samsung_front_load_washerqgk80.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459337/normal_5ff9ec3b1c36f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476577/normal_60011a09eec2e.pdfIn PDF document text
    • http://com-connexion.xyz/hyperrogue_source_codep3n06.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449996/normal_5ff1afa7f3747.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483856/normal_603722d4c75ad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468259/normal_6041a03478b08.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413465/normal_60265d8ccb8eb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369328/normal_604d29aab2526.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4498376/normal_5fe607ac1a635.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418184/normal_5ffcc639e5af9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403429/normal_5fe644aca6cb7.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/lopeteb/biology_exam_paper_answers.pdfIn PDF document text
    • https://2791e1c6-719d-47aa-bdc5-1556df251b63.filesusr.com/ugd/7757c5_3457ae4e89d04be7bde25aec667b8189.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zebarufuridorur/bawikimunufusu.pdfIn PDF document text
    • https://67dc9804-4028-4298-afd7-d431d2c16fe6.filesusr.com/ugd/559c84_b089bb5793b448baaf3ec6d15050ac28.pdf?index=trueIn PDF document text
    • https://fb7bf4c5-056f-4058-a7d1-073478569b53.filesusr.com/ugd/d90490_219e5d14af7a42818d2176423f27bcd1.pdf?index=trueIn PDF document text
    • https://1e16f6d7-285b-4488-bf07-d3e24ac90e20.filesusr.com/ugd/417718_3b6a34f37d16448098a0b7b9a0321d06.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xisefowu/vatekigemok.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_off0000f453.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF453 5508 bytes
SHA-256: af0b7197aaf14132ded8f3cbb2ccda866e2d157caba2e6ab9c88c9b6b0bd4fa6
font_01_sfnt_off00010717.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10717 10880 bytes
SHA-256: 78d48c72aa98e61df42ec3eca83e687286faf10be05725393ff9e27a6e835cb9

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