Malicious PDF — malware analysis report

Static analysis result for SHA-256 8fea6b30fd92648a…

MALICIOUS

PDF

72.4 KB Created: 2021-02-21 02:40:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: b704cd75e3e209eafaaa20984a71ac87 SHA-1: 59272da59572b4af9e5c68d97063e93332ec0062 SHA-256: 8fea6b30fd92648a7d6504ce03e111c94c06ff205b7d8612623427e88d07a2ee
214 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically identified as a malicious redirector. The presence of a large link farm and a critical ClamAV detection for 'Pdf.Phishing.Trojan' strongly indicates a phishing or malware distribution attempt. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of malicious intent, likely leading to further compromise.

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
  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation 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://crophysi.ru/123?utm_term=the+house+on+mango+street+plot+summary In PDF document text
    • http://yazansoft.com/tinenasiradesenomgiy0.pdfIn PDF document text
    • https://cdn.sqhk.co/mexovaru/jbjb0ig/hell_rider_movie_nicolas_cage.pdfIn PDF document text
    • https://voxomusixexuso.weebly.com/uploads/1/3/4/8/134851372/wokibitolefogipeno.pdfIn PDF document text
    • https://cdn.sqhk.co/vemunaxudug/iaqzZCT/miranoratenefubej.pdfIn PDF document text
    • https://cdn.sqhk.co/nijegonusas/dPEihA3/12505465817.pdfIn PDF document text
    • https://cdn.sqhk.co/sakiforivona/62smhd8/stickers_for_messenger.pdfIn PDF document text
    • https://cdn.sqhk.co/fusozuwalas/lXghgit/fifuwupamakime.pdfIn PDF document text
    • http://italywow.space/whmis_safety_data_sheet_for_gasolineiuc6h.pdfIn PDF document text
    • https://cdn.sqhk.co/xuxozowaki/Xuf3Vhx/60117983624.pdfIn PDF document text
    • https://cdn.sqhk.co/wusezofetib/pjchiAe/cut_the_rope_2_apk_download_uptodown.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://s3.amazonaws.com/xoguwavosuje/bokofegepigojefele.pdfIn PDF document text
    • https://s3.amazonaws.com/pululusodogi/vitevurub.pdfIn PDF document text
    • https://s3.amazonaws.com/petikamov/mgma_salary_data_nurse_practitioner.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_off0000d69b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD69B 5116 bytes
SHA-256: 75629d598eae26eed866180e3fcf2018c2c62fe01849f331deb73bc9de6cea9f
font_01_sfnt_off0000e7d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7D6 8896 bytes
SHA-256: fbdfed1d1373ae4bfeb00e3d3a567a1ffe626632d3389142fe688b86b28b393f
font_02_sfnt_off00010652.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10652 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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