Malicious PDF — malware analysis report

Static analysis result for SHA-256 54bd91fd4354fa35…

MALICIOUS

PDF

64.4 KB Created: 2020-12-21 23:50:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: e69a37e0b71a24551a169630d6329733 SHA-1: 555bb220f3e570f6db34135be0b229b39d7910dd SHA-256: 54bd91fd4354fa359c1f1d9e7198717aa048ac75d86698f5f690a6882bfec6dd
162 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ggraff.ru, which is associated with phishing and malware distribution. The document body, though heavily obfuscated, suggests a lure related to a 'coupon code for walmart grocery app', indicating a phishing attempt. The ML classifier and ClamAV detection strongly support the malicious nature of this file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://ggtraff.ru/strik?utm_term=coupon+code+for+walmart+grocery+app In PDF document text
    • https://cdn-cms.f-static.net/uploads/4388611/normal_5fa33ea55c820.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366365/normal_5f87af8acd9a5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446643/normal_5fad22d92d58d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369797/normal_5f881ec653931.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://uploads.strikinglycdn.com/files/62b44005-1b30-4761-be94-d64086048d30/1003108018.pdfIn PDF document text
    • https://s3.amazonaws.com/fajonubinomeder/50722125661.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d2482e1-27b3-4d2c-ac53-159d09fce88b/kibogavifebamepijidig.pdfIn PDF document text
    • https://s3.amazonaws.com/wifukedot/31078564249.pdfIn PDF document text
    • https://s3.amazonaws.com/mejados/busimoxugaxawe.pdfIn PDF document text
    • https://s3.amazonaws.com/fedojigudaj/65193644113.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b4b70f5-6685-413b-8017-f87fe318287a/42409278482.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/789df6b9-3c00-4bcf-95ee-c959d4e57a6c/katopiligadaxidivupubuwi.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0dde4403f5353fd9590af/t/5fc22817cb3e0f577198b320/1606559768635/dofireserafexerajetosot.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fdd2c3cb0b7d26d496ab432/t/5fddee6f2629b066aba83f0a/1608380016188/cochlear_baha_5_user_guide.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b0ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB0EA 5348 bytes
SHA-256: 9593a7dead95b4f45249129fe9e78c2d7324071927e49e0518a767c5add4ad4c
font_01_sfnt_off0000c31d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC31D 10324 bytes
SHA-256: 5816032e9193a03c90d33d8750fbb42c6f05204a6130c0f592e3da504764e173
font_02_sfnt_off0000e66f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE66F 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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