Malicious PDF — malware analysis report

Static analysis result for SHA-256 b30330ff17be63c5…

MALICIOUS

PDF

125.4 KB Created: 2020-12-24 09:07:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 16a0f3380805011fe435df0401a36325 SHA-1: 9d2eef22874f324f5ff6b34ed60d380b0bbb3061 SHA-256: b30330ff17be63c50f4bc45e4332f5d42f27076e2c42166ffe4397acc1f65234
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 4

  • 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.
  • 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/123?utm_term=cupid+2020+wiki In PDF document text
    • https://cdn-cms.f-static.net/uploads/4412775/normal_5f9570baa0b1f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370097/normal_5f97c794f302d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420588/normal_5f9ae2a4e7f5c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444370/normal_5fbabef0cf7f8.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/60efdd19-df24-486e-b917-03b57b4798de/poemas_de_leonardo_da_vinci.pdfIn PDF document text
    • https://s3.amazonaws.com/tuzamada/heartworm_society_treatment_sheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37ff6d74-bb49-4591-b70c-ede531071783/division_2_eagle_bearer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c90d45d-0d83-47ee-9569-5dfc0fc445bd/flaming_gorge_fishing_company.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51210449-cd36-403b-befb-f05ab8d92d01/starblazer_adventures.pdfIn PDF document text
    • https://s3.amazonaws.com/vifusupegiza/35173742093.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/533fb018-38d2-434c-8a60-c9e65d8da06d/national_sorority_of_phi_delta_kappa_logo.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_off0001826f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1826F 12636 bytes
SHA-256: 8edd52c7ffedaa8592e8453f9ccbad716f16c2cb6eb21c08d86a36d0a7d75a04
font_01_sfnt_off0001ab15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AB15 4772 bytes
SHA-256: ef0c22a53c75c6c31239704579b8f41867f4575ccdb2ee915ae7f43d9aa87b5e
font_02_sfnt_off0001bb7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BB7E 14704 bytes
SHA-256: 8599fa42fe48a45c0c4556d121154766bb2b85c14a81cd3aa0e498151ef6ac28

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