Malicious PDF — malware analysis report

Static analysis result for SHA-256 9aa38f573cbc26a0…

MALICIOUS

PDF

74.6 KB Created: 2020-12-27 02:56:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 4621704946ce6ae84dc809308320a4c6 SHA-1: 3882db8919f029f8886782e746afe1faf67b0246 SHA-256: 9aa38f573cbc26a0cadd298183d97b123e29eaa371425805c1140b557a1f9d14
194 Risk Score

Malware Insights

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

The PDF file contains a lure related to 'Outlook not syncing with gmail app', which is a common pretext for phishing or credential harvesting. It embeds a URL pointing to known malicious redirector infrastructure, `https://gettraff.ru/123?utm_term=outlook+not+syncing+with+gmail+app`, which is designed to lead users to malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely involving the exploitation of PDF vulnerabilities to execute further payloads.

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.
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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://gettraff.ru/123?utm_term=outlook+not+syncing+with+gmail+app In PDF document text
    • https://cdn.sqhk.co/fakobijo/jd3HNjg/pic_collage_software_free_download.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e90d853-480c-4087-bde2-eca5180d5c2c/mesibufabajizuritanolax.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d742f57f-22d0-4f4e-b395-ee67b091cde1/co2_masa_molar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/53664335-96f4-4390-8e4d-b63cf9aba475/exclude_package_maven_build.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7a3d98f-813d-4156-bf48-f82ed074905a/budget_dello_stato_italiano.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1e591bc-b033-4dee-83a4-5b11db359963/wawemonoxojidiwu.pdfIn PDF document text
    • https://s3.amazonaws.com/jifesu/nuwovaronakij.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/037ed4e1-94a7-4c0e-a499-f2fe9b8042c3/26501094860.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8db6b8d3-a5f3-4074-af16-2de2e64789ff/dasakegumubebomonedof.pdfIn PDF document text
    • https://s3.amazonaws.com/gedexim/dusub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/349c8bda-50a4-4e2e-bcc1-ec711f009f69/81391933877.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f09d136d-d71c-4b82-92af-f57337c696a3/47682157800.pdfIn PDF document text
    • https://s3.amazonaws.com/povodijirig/barc_recruitment_2018.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/efcc1103-71f5-48df-8f1a-2d26e9dce101/58223562451.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_off0000e5f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5F3 5536 bytes
SHA-256: 181156bbbf0266b5239813e32aaf65e14defa6cf1238513e85e80a531549ed8a
font_01_sfnt_off0000f8be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8BE 11480 bytes
SHA-256: 91830e744bf3527c0a8ede5965371f3264cef139e77adc1c791835ef5d964440

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