Malicious PDF — malware analysis report

Static analysis result for SHA-256 91811f095c60416b…

MALICIOUS

PDF

214.8 KB Created: 2020-11-23 11:02:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 40de8460203fbe397760337a2403d694 SHA-1: 9888da8cb6af286d3a849ad8540036299e7c9443 SHA-256: 91811f095c60416bc2c6cc5c2c9d5e572e153c81bec32a419aeb5906cbae70f1
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses brand-impersonation credential phishing. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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
  • 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://vagipirisixo.weebly.com/uploads/1/3/4/8/134861957/1926338.pdf.
  • 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://traffset.ru/123?utm_term=emerson+cqc+7 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4461763/normal_5fa95ef3a2530.pdfIn PDF document text
    • https://vagipirisixo.weebly.com/uploads/1/3/4/8/134861957/1926338.pdfIn PDF document text
    • https://sivivaleretuvu.weebly.com/uploads/1/3/4/3/134324596/noxol.pdfIn PDF document text
    • https://kafaziwe.weebly.com/uploads/1/3/1/0/131070109/68eef8c4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451375/normal_5fa53199d0c1c.pdfIn PDF document text
    • https://junipupupu.weebly.com/uploads/1/3/4/7/134739756/nolafilijokesup.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/6007703a-63bb-468a-bcf1-4a0b8d8a8500/zunirewa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/26d2d7f2-cac0-4a1a-8333-2ed8224cdfc8/32982200878.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0fe48c1e-8bb9-4656-b49c-3c49ca25a47a/zikegalasev.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/93b4d40f-74eb-4f78-a49f-da5794a4a2b8/dragon_ball_xenoverse_trophy_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c75f058-a441-456c-938f-349a98868280/bawefezuzife.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2108bca-1656-4cbc-81a1-cb2f89116408/77598507062.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6467aa2-c45a-417f-b418-7619e152eb4f/washington_charter_schools_commission.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0002f451.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F451 4868 bytes
SHA-256: cc543c0580e4f7b624f1b208636a798768668146d0d8ebd529d2d0f44fc034e4
font_01_sfnt_off000304dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x304DC 13392 bytes
SHA-256: ad2ede3d25f8c6a7b48a4da02a996139515fbf21bbec2fea35cdf2a0a09fbd6a
font_02_sfnt_off00032fc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32FC5 18968 bytes
SHA-256: fef6ad26b3bd952b5d9afcab369b46ce07d97fa471ada00ccaf11238710ea09c

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