Malicious PDF — malware analysis report

Static analysis result for SHA-256 efe2c9e74f4f3182…

MALICIOUS

PDF

75.2 KB Created: 2021-05-22 18:49:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: a6e7041703b8e5ee821e35cf67bd3dd5 SHA-1: 10dd95ec710bc3feab415e957a0e0775e314324a SHA-256: efe2c9e74f4f3182ebf684768b399abc0b49b24c61a162bcc7b53c80f5a49fc4
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://zajinet.ru/strik?utm_term=passtime+gps+install+diagram PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4448539/normal_6038d71638635.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479932/normal_5fc7c5b126f54.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486748/normal_60435f9b7cbf0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475987/normal_600647745832e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415081/normal_601ba5558c10a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501027/normal_60217f5e8e325.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415770/normal_6049a88f22118.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382186/normal_5ff1042ee15c1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387814/normal_600d7186c8fe5.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/latufenaw/84929625431.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76233c58-f937-455a-ad3a-c5f7f89c7511/11550259540.pdfIn PDF document text
    • https://s3.amazonaws.com/zidenigad/1733427876.pdfIn PDF document text
    • https://s3.amazonaws.com/wixanarer/34308156908.pdfIn PDF document text
    • https://s3.amazonaws.com/lewuli/volkswagen_transmission_fluid_fill.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44bfff02-b33c-4b6c-9868-61ce0268d18f/sekukuditig.pdfIn PDF document text
    • https://s3.amazonaws.com/wopari/28006220905.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f80c1d68-4f87-422f-aae3-086deb0eeaae/20340326438.pdfIn PDF document text
    • https://s3.amazonaws.com/voxulija/79410331654.pdfIn PDF document text
    • https://s3.amazonaws.com/godoremitiwuja/87790112527.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_off0000e7da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7DA 5280 bytes
SHA-256: 112360bd6d4ed582a15108278437feb6b341212f77d9e5841196f90df54b05a5
font_01_sfnt_off0000f9b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9B7 11136 bytes
SHA-256: b9edd2f02014c51c7d3560b8733fa911f7c3324880b46035f64efb2072661e85

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