Malicious PDF — malware analysis report

Static analysis result for SHA-256 d905627efffb758a…

MALICIOUS

PDF

70.1 KB Created: 2021-01-03 05:38:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 7ce9a1d04543b984002b9c679d0d2ee6 SHA-1: 6798f3f21c40265da63b8ffff5ee21da4c29ba7b SHA-256: d905627efffb758a9c2eca50af47eca8e99d7f23cbda8aba13279b58a35b7725
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a security-bypass lure. 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 0.9997

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
  • Security software disable instruction high SE_SECURITY_BYPASS
    Document instructs the user to disable antivirus or security software — unusual for ordinary documents and high-risk in an unsolicited file
  • 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://trafftec.ru/aws?utm_term=aspen+hysys+v11 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4444882/normal_5f9e15455c35e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378157/normal_5fc9afb192e0d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366646/normal_5f8f5e5fbda36.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479942/normal_5fc9054b34da1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413004/normal_5fd95a4211bdc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448113/normal_5fdc431abff9d.pdfIn PDF document text
    • https://suvuzijovibalis.weebly.com/uploads/1/3/4/6/134660606/a88a4a0f0.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/jinabom/black_clover_fana_elf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/13bd45ad-111f-4f89-a04b-52e83c9df261/chronological_order_of_the_book_of_daniel.pdfIn PDF document text
    • https://s3.amazonaws.com/megulu/true_grit_by_charles_portis.pdfIn PDF document text
    • https://s3.amazonaws.com/tokit/98995651012.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_off0000d33b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD33B 4772 bytes
SHA-256: 33af36469da7a5fd5ccc8d673a254ac9bbab21f626101f2cfb7be5bdc98fb62a
font_01_sfnt_off0000e38d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE38D 14004 bytes
SHA-256: 00705cde419c3106afca7f927160dad08ffa4e8ff3f13a8bbf33e832f1a7198e