Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6f784f962ba4971…

MALICIOUS

PDF

69.4 KB Created: 2021-01-01 12:27:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 80a8a601578c130a0f7d81ba9dd37bc8 SHA-1: ed3557f5b3c60c09def702daf2ac81909124a4e6 SHA-256: e6f784f962ba4971b34d3e2f232ee90adc4cee5899274c2e473dbffd1c79736a
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with at least one pointing to known malicious redirector infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the presence of numerous links suggests an attempt to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://ggtraff.ru/123?utm_term=eastern+coastal+plains+cities In PDF document text
    • https://morurotefat.weebly.com/uploads/1/3/4/3/134317018/9f0b5e9c6.pdfIn PDF document text
    • https://kolapudavuvoxe.weebly.com/uploads/1/3/4/3/134315715/golunola.pdfIn PDF document text
    • https://lodonukatozusa.weebly.com/uploads/1/3/1/0/131070116/lefolakafe.pdfIn PDF document text
    • https://fipupoluvov.weebly.com/uploads/1/3/0/7/130775710/watofovanukefi-nutabiloxaxukef.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/bf986904-9802-4529-912f-7ff98f514657/82469268544.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eab29b89-15a1-45c2-b1c0-104532d099f1/73066228197.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01ba972c-3a40-4fd2-8003-56e5b8bd55c0/how_many_bottles_of_water_in_a_half_gallon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f8b30bd-772a-4592-9a4a-e94aaea6f0f2/20954988245.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e10d3f7d-7955-4179-9d9f-7a8aeb18aff5/minagatexufen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8000056f-6619-4f5f-9fdc-97e50d738880/87854788685.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1af3883-0ffb-43b4-9148-504949bef97a/mcluhan_mechanical_bride.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9595637-6272-441e-b9f7-db53b8b38b81/18487746207.pdfIn PDF document text
    • https://s3.amazonaws.com/muvunekagok/concepts_of_programming_languages_robert_w._sebesta.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0cf01b8a-c247-4adb-83e6-f6cfc9b60f7e/sat_formula_sheet_given.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_off0000d491.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD491 4884 bytes
SHA-256: d5a7fa3e01cfe270609b2e5498daab59520ccfb17a12b43d3f83ee5e31ab268f
font_01_sfnt_off0000e541.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE541 10424 bytes
SHA-256: b77b81f3b71758f69165a370a39c08a28a6fb769f48cad1da7757f80d4a68491

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