Malicious PDF — malware analysis report

Static analysis result for SHA-256 df7c0689eba7b90a…

MALICIOUS

PDF

78.9 KB Created: 2021-01-05 17:20:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: b98ceb68fcc450c1812de2411d1bbcdc SHA-1: d19526c3c006317ba8f9ba2539159eb2b7ddf7fb SHA-256: df7c0689eba7b90ad0e752fe5e63a73a617d307016a01fc84724e0cbbc4d86f3
314 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1534 Internal Spearphishing T1059.007 JavaScript T1204.002 Malicious Link

This PDF file is identified as malicious by multiple heuristics, including ML classification and ClamAV. It impersonates the Amazon brand to lure users into clicking a link that redirects to a credential phishing page. The document also contains a large number of external links, suggesting it may be part of a link farm or SEO manipulation scheme to distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://jipunexekamu.weebly.com/uploads/1/3/4/5/134588935/gebipomimazo.pdf.
  • 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://cctraff.ru/wb?keyword=eye%20contacts%20online%20canada In PDF document text
    • https://cdn.sqhk.co/wefekoferu/jbi2Mgf/yellowstone_season_1_episode_2_soundtrack.pdfIn PDF document text
    • https://jipunexekamu.weebly.com/uploads/1/3/4/5/134588935/gebipomimazo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371246/normal_5f900a09be27f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4428039/normal_5fc6c0ec052c1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366660/normal_5fa40866bb6fc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369138/normal_5f952e9080415.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367644/normal_5fcb63737e645.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372373/normal_5f94265ec416b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447271/normal_5fa5e7663eaaf.pdfIn PDF document text
    • https://cdn.sqhk.co/lapefuxolu/LBigJhf/74819301771.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/tubupejevomo/berabokamajagip.pdfIn PDF document text
    • https://s3.amazonaws.com/bulozor/fogosatixebobapoxip.pdfIn PDF document text
    • https://s3.amazonaws.com/pazerogasarinu/afficheur_lcd_arduino.pdfIn PDF document text
    • https://s3.amazonaws.com/posufij/motor_megger_test_report_format.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/368b32e0-65ce-447f-a76d-d3d02fc2d509/nudekiz.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_off0000f829.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF829 4896 bytes
SHA-256: 74c36309edcf7b872ff4778927127cac3f33d32b9dfbe9b8359177a52e933e6b
font_01_sfnt_off000108f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108F0 11180 bytes
SHA-256: 997729ff5f1f89a84f7bf2991b5df6019aa8748fee9a2b06e14e50a6cc9b233c

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