Malicious PDF — malware analysis report

Static analysis result for SHA-256 69a8d3fbd9d52a07…

MALICIOUS

PDF

86.7 KB Created: 2021-04-07 01:35:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 97820c2e375a689fe868b4053de9fc26 SHA-1: 94facaa6e4af1f2ebf092227d0ff8093543fef00 SHA-256: 69a8d3fbd9d52a0773c844397325ac21b110b99949e48e2f61960ac51b5ee4c4
134 Risk Score

Malware Insights

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

The PDF contains external URIs and is flagged as a link farm, suggesting it's designed to redirect users to malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The presence of 'airdrop windows 7' in the document body further supports a social engineering lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://resalured.ru/123?utm_term=airdrop+windows+7 PDF link annotation
    • http://xexapitanegis.getenjoyment.net/12442789793.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447089/normal_6025ec5dc149a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420902/normal_603a4aaa0f453.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408712/normal_6011b0ad0035e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495241/normal_60579cba0e0ad.pdfIn PDF document text
    • http://kolometagavim.22web.org/escala_cromatica_guitarra_electrica.pdfIn PDF document text
    • http://sibidadaduzej.iblogger.org/qasida_burda_shareef_download.pdfIn PDF document text
    • http://www.typoland.com/http://www.typoland.com/designers/Lukasz_Dziedzic/CopyrightIn PDF document text
    • http://www.typoland.com/In 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/ea506ba5-4954-49af-b05c-5a0ea2aed89a/suwinukowuxatudegasawave.pdfIn PDF document text
    • http://rawopewudoj.rf.gd/zidupukov.pdfIn PDF document text
    • http://wenares.myartsonline.com/hitachi_nr90aes1_nails.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83ac8644-4f33-4aa5-bc34-082d5f545451/mekiguvuvulusuralikivukiv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc391a89-afb0-42ad-8f83-50a6347aafd1/triangle_angle_worksheet.pdfIn PDF document text
    • http://mowiwanafiv.epizy.com/muwiwi.pdfIn PDF document text
    • http://niwurekatexo.atwebpages.com/33807189238.pdfIn PDF document text
    • http://dixegozep.rf.gd/bevawupemaxutesosifesoj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6734007a-370d-4c8c-8430-042703df8d6a/texebade.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/42ffaa0b-0e94-4807-932f-6de8991ffbb7/9790460247.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68b6f848-bcc5-4938-a527-482ef861448b/gizunuga.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/58f9795b-102b-4e80-9c6d-fb4dd72ee8e2/jaybird_x2_replacement_foam_tips.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/881f3f2c-b9e6-477c-a3de-efc267515db5/blues_scale_guitar_exercise.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef32625a-353a-4de8-b33e-fa1a1a7d5de8/35104630273.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f9b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9B2 6168 bytes
SHA-256: 9f07a400e75c177e496f395344003d4a7545e118b36bf59d530d47f9bb3550f8
font_01_sfnt_off00010951.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10951 4464 bytes
SHA-256: 2bccd58ad207c12e2423a9c8a8b206c7122b58165de861578969296fc8eddb18
font_02_sfnt_off00011883.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11883 11400 bytes
SHA-256: 0a7361b696b61da6baedc155561efcfd9ffa95f0f22073cb05f75ce04640a43d
font_03_sfnt_off00013f42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F42 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e