Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f041d218416dea1…

MALICIOUS

PDF

69.1 KB Created: 2020-11-20 08:32:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 0175b2ed593436be19a15daf1a9ff6fe SHA-1: d0b4ff65c0bbae23ae8ee4c7204f4a213646a282 SHA-256: 9f041d218416dea1f8c9486bbcfa1b49f30eb99d3a5f1da5d361ba9605e6cbc7
214 Risk Score

Malware Insights

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

This PDF file contains numerous links to external resources, with one identified as a malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The embedded links suggest an attempt to redirect the user to potentially harmful content, possibly exploiting vulnerabilities within the PDF reader.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffmen.ru/aws?utm_term=rise+of+kingdoms+legendary+commander+guide In PDF document text
    • https://tobuzedatenet.weebly.com/uploads/1/3/4/3/134322281/e869aa6e12d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416322/normal_5f99b74557ea6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390329/normal_5f98580fba966.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/gotenukevepunin/jifowoxuxewobelirus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82eebd1d-59f0-4a1f-9f9a-7c0dcc4b1ad7/warlock_spell_table_5e.pdfIn PDF document text
    • https://s3.amazonaws.com/fidefofudi/1958727091.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/46bda6fc-8452-486b-a248-1a86fd7c655c/vitokuwojikebopobeja.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1f55635-f73e-455e-8db3-1f5d50c13a0b/vimuwuwofasulevexu.pdfIn PDF document text
    • https://s3.amazonaws.com/lekizopiloref/pazavinukoxivemarato.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9521df19-3dff-434c-9924-d7caf1e9edbc/7279903526.pdfIn PDF document text
    • https://s3.amazonaws.com/gurowozenupifi/92301367417.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f430aa8-6a54-4a6b-967c-e46a10d12c7e/organic_chemistry_answers_app.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_off0000d1e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1E3 5512 bytes
SHA-256: 2053f1a271396c02d4551af80faeddf3e766742f3cfe96be9df4096641221004
font_01_sfnt_off0000e49e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE49E 10192 bytes
SHA-256: edea3f40bb34b8d7451737e131284841fd9f20cef10b7c6202bebd552e26004a

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