Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e917131ac7253cf…

MALICIOUS

PDF

75.8 KB Created: 2020-11-19 02:13:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2252567cd4ae2ee0841916b8f86d2ea8 SHA-1: 7451a2445524a708ad824b0b9da2fc7e1fb7ec9d SHA-256: 5e917131ac7253cf55e6acf8bf109223e9b4ca613e1b5e55cd25e0d3638fe2d4
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, a common tactic for link farms or phishing campaigns. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. The embedded URL points to a suspicious domain, suggesting it's the primary destination for the malicious activity.

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://traffking.ru/123?utm_term=the+giver+chapter+12+and+13+questions+and+answers
    • https://tejigenunonim.weebly.com/uploads/1/3/0/8/130813632/eecc1.pdf
    • https://vuvajufuzuno.weebly.com/uploads/1/3/4/4/134480129/rerurum.pdf
    • https://fisokupavunimi.weebly.com/uploads/1/3/4/4/134469682/4d5d3.pdf
    • https://bevatisaxotel.weebly.com/uploads/1/3/4/3/134378436/1756052.pdf
    • https://lupojevoken.weebly.com/uploads/1/3/4/4/134468235/5e0261f79.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/487e9710-6607-41a3-a57a-e6e8915f3f87/ames_high_school_utah.pdf
    • https://s3.amazonaws.com/vezumobigodub/state_bank_of_countryside_payouts.pdf
    • https://uploads.strikinglycdn.com/files/8df71d88-3771-4a6b-bd34-e3be5430d1f9/58594748556.pdf
    • https://uploads.strikinglycdn.com/files/430b3247-525e-4f0c-aac5-db79acfad911/newere.pdf
    • https://uploads.strikinglycdn.com/files/6d3ca627-8cb9-44a1-944a-829e6e720519/17653177174.pdf
    • https://uploads.strikinglycdn.com/files/07df7a39-449f-473f-a92e-ff7b768fb551/lekevewob.pdf
    • https://s3.amazonaws.com/fajixe/command_for_fastest_horse_on_minecraft_pe.pdf
    • https://uploads.strikinglycdn.com/files/78f4732c-6672-4d99-9455-f6f97cb67b24/63697560861.pdf
    • https://uploads.strikinglycdn.com/files/42d189ab-dcd6-43f4-92f9-044c0e82593b/the_tale_of_despereaux_book_online.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://www.geocities.com/mitra_anirban/hobbies.htmGNU
    • http://www.gnu.org/copyleft/gpl.htmRegular

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ddb2.bin
2f4086a8206ce9c1ba51b5d8c9ab40db4b025b712096e0fcdcff3f8b8e523917		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDDB2 5880 bytes
font_01_sfnt_off0000f1c6.bin
d5ecec3e822993868ba70e247019bcdb656a9fee58d620eb93bc70658e929280		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF1C6 3720 bytes
font_02_sfnt_off0000fd29.bin
64dc5eaba96611881cad7497845008a651d083356dfcdba7ee5532c2baa60f1a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFD29 10772 bytes

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