Malicious PDF — malware analysis report

Static analysis result for SHA-256 8cc8080ecd6f5043…

MALICIOUS

PDF

83.3 KB Created: 2020-12-29 14:03:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e376194940204061c71aa912c542768f SHA-1: 1c9c8e52d3651c6bf4a1620953ebb2e864683acb SHA-256: 8cc8080ecd6f5043179e35720a52e290ef102ec4b7ac76d38531081453f2e472
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to Weebly hosted PDFs, indicative of a link farm or phishing campaign. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external links suggest it's designed to redirect users to malicious sites, likely for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://traffine.ru/123?utm_term=densidad+del+agua+en+g%252Fcm3
    • https://tenuzovew.weebly.com/uploads/1/3/0/7/130740022/judawokiwu-sozunadak-malutugadab.pdf
    • https://poraduke.weebly.com/uploads/1/3/4/3/134385775/tijivirave.pdf
    • https://debuvubuni.weebly.com/uploads/1/3/4/8/134846467/3b2a7e.pdf
    • https://cdn-cms.f-static.net/uploads/4408460/normal_5fb54fede66f1.pdf
    • https://digonowokeke.weebly.com/uploads/1/3/1/8/131856318/1e096e798f7.pdf
    • https://sujajikozodes.weebly.com/uploads/1/3/1/3/131384638/34149.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/f1a340ab-78f4-461c-956d-7296962d795a/81215028625.pdf
    • https://uploads.strikinglycdn.com/files/42850205-ae93-44ad-8d05-12581f8d240e/68090201325.pdf
    • https://s3.amazonaws.com/wikurixobelu/functional_power_training.pdf
    • https://uploads.strikinglycdn.com/files/c3a0a33a-5fe2-4b6b-baea-5e62e06df682/wagewu.pdf
    • https://uploads.strikinglycdn.com/files/8633031e-69f8-4698-9ab9-f115d1f42ac3/ap_seminar_iwa_examples.pdf
    • https://s3.amazonaws.com/wukara/zirigido.pdf
    • https://uploads.strikinglycdn.com/files/e28c3371-5feb-4cd7-862f-af89a1409401/microblading_eyebrows_near_me.pdf
    • https://uploads.strikinglycdn.com/files/720aa501-dbe4-4076-bf41-6838b0d57987/7293254338.pdf
    • https://s3.amazonaws.com/rakabexozu/filemaker_pro_book_library_template.pdf
    • https://s3.amazonaws.com/figugipopar/fazejif.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee0d.bin
92ccd95eeddb1ea8207000f0e0317d136a17da5ff6860058adef9adbdd394a86		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEE0D 5360 bytes
font_01_sfnt_off00010047.bin
f593fa5b8bf1d8b02953c72c47d57475df0f09ed926238d32844b5ebe2ac1b4e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10047 12844 bytes
font_02_sfnt_off000129dd.bin
2d958bd008b8db5b33092f112e99c856adbcc0a100e950d14ff814b784be6357		 pdf-font-stream PDF embedded font (sfnt) at offset 0x129DD 16060 bytes

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