Malicious PDF — malware analysis report

Static analysis result for SHA-256 15e8e9b3624d47ed…

MALICIOUS

PDF

67.8 KB Created: 2020-11-23 06:01:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: ef49b065aa6e62bafc73ef2ac369645e SHA-1: 350abe2e7ffc10c320d21850980d871be5863e65 SHA-256: 15e8e9b3624d47eda5f94a47b432e502dc0fd6a9748569107164df0eb8f352ca
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://cctraff.ru/aws?utm_term=argon+admin+template'. This URL is likely used to deliver a malicious payload or conduct phishing. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the embedded URL and the nature of the heuristic suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/aws?utm_term=argon+admin+template In PDF document text
    • https://cdn-cms.f-static.net/uploads/4409610/normal_5f97a60f45000.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374533/normal_5f8d4c7d18764.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378848/normal_5faa41d907dba.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/gupuso/sogaruvufamosovoxefewuxe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e638abc-ecf4-4f85-869f-a15803a5503b/2020_estimated_tax_calculation_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f21b0f3-ef3b-453b-a315-d7d9443c5e4f/wwe_2k_game_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/77cedef0-d2db-4197-96f4-d111fa68064a/36294754660.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0facc4aa-a57f-4448-877f-e3cd4854f5bf/77273312551.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dafc4e57-494b-4b13-bb73-9c51825d4663/pezavuxunepolajovalak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b52d05b-1fa0-4e5f-856e-50aa87601e1b/xedivetebimub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cebc5e92-be3f-4425-bc72-a9c8be717183/munagawufofigigusosijo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/78e6ec46-dac6-4887-a044-47043df7adab/sizesefajutifaxawalasuvan.pdfIn PDF document text
    • https://s3.amazonaws.com/mipeboro/bow_bow_movie_online.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_off0000c473.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC473 5088 bytes
SHA-256: c7652bb3974635e94e33262df34daec1627bb392315de127a55e2ed211082f56
font_01_sfnt_off0000d5a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5A6 1944 bytes
SHA-256: 7932509be1e40105bdd258571eb76ae0f55fe3a6bfceda6ca1889edf5877ef86
font_02_sfnt_off0000de89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE89 10528 bytes
SHA-256: c660fdf2d47bf55cffaaa5aa6b75a36218a24da18efa7e5ca0816e812d328b9b

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