Malicious PDF — malware analysis report

Static analysis result for SHA-256 6dbbfd4e68b4ea04…

MALICIOUS

PDF

75.5 KB Created: 2021-03-08 09:06:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: dff83b3ba1438acf434f7c9a39bbbd76 SHA-1: aaf43c50c69e8801dba5d943e68d910629a38094 SHA-256: 6dbbfd4e68b4ea0496719ae36daefb2f4f6a32b766bc98d4b85cfadf01e95a98
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a common tactic for SEO link farms and phishing campaigns. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of generated links, suggesting an attempt to manipulate search results or distribute malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery via the embedded URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • 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://jacksth.ru/strik?utm_term=vizio+m65-c1+specs PDF link annotation
    • https://gikesusemu.weebly.com/uploads/1/3/4/7/134775173/rogisubi.pdfIn PDF document text
    • https://zanazajerepa.weebly.com/uploads/1/3/4/0/134012527/5208718.pdfIn PDF document text
    • https://solezoxi.weebly.com/uploads/1/3/4/6/134654925/gevumafite.pdfIn PDF document text
    • https://wuliwedifa.weebly.com/uploads/1/3/4/7/134753749/708835.pdfIn PDF document text
    • https://worivoka.weebly.com/uploads/1/3/4/5/134588103/f3aff7e6.pdfIn PDF document text
    • https://vulemozebo.weebly.com/uploads/1/3/4/6/134693025/976c819b.pdfIn PDF document text
    • https://bakadowo.weebly.com/uploads/1/3/1/3/131380427/5314952.pdfIn PDF document text
    • https://fulotetaputu.weebly.com/uploads/1/3/2/7/132740707/tisenekubad_kotazezuw_ximopu_raxanijuraregew.pdfIn PDF document text
    • https://zivibesojosilit.weebly.com/uploads/1/3/5/3/135304262/xifosolonase.pdfIn PDF document text
    • https://lekaretuzej.weebly.com/uploads/1/3/0/7/130738752/zilijul.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/29b7daef-4e2e-4ec7-a51a-3d64a41aa29f/best_machine_learning_books_quora.pdfIn PDF document text
    • https://s3.amazonaws.com/luropi/57479169046.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d226af2-8b36-4971-9298-7d53ea8704be/oster_vegetable_steamer_instructions.pdfIn PDF document text
    • https://s3.amazonaws.com/tikofaketonub/glencoe_virtual_lab_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/farefasejikap/92867315715.pdfIn PDF document text
    • https://s3.amazonaws.com/luxaduzimase/27856593707.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/59801ec3-01ad-4764-9450-dfcceaac079e/jump_rope_dudes_leg_workout.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/213af66a-cb5b-4447-978d-3ffb262e16fd/5453345311.pdfIn PDF document text
    • https://s3.amazonaws.com/juwofuxufijup/how_to_use_my_dyson_attachments.pdfIn PDF document text
    • https://s3.amazonaws.com/fidefofudi/suwipenelo.pdfIn PDF document text
    • https://s3.amazonaws.com/bomifabipi/41721563808.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_off0000e74a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE74A 5116 bytes
SHA-256: fb0723796209c26b60b1b1bafaeaadf5b10f3de7351d3b68b258d70dc0b198de
font_01_sfnt_off0000f8c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8C8 11368 bytes
SHA-256: 551b8642e49dbb511e14ae08749bd1359aad1296d5475fd71850ff0b5e380caa

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