Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ed4f65b367128f1…

MALICIOUS

PDF

75.2 KB Created: 2020-11-19 21:19:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3cc917bc431a9a104b92de8a8acff62f SHA-1: 58bfbaded1c2baa1e120d3e9106b6b044e481901 SHA-256: 6ed4f65b367128f16f62c2994be67224777e04b9dd9bd691f0d614920a6efc37
214 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, which is part of a link farm designed to distribute malware or phish users. The document body, though heavily obfuscated, contains text related to 'free movies online', aligning with common phishing lures. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://traffmen.ru/strik?utm_term=filmy+online+zdarma+bez+omezen%25C3%25AD
    • https://jirunemopisitex.weebly.com/uploads/1/3/4/3/134332051/majoxevufova.pdf
    • https://givexikiduxa.weebly.com/uploads/1/3/1/3/131398224/8891976.pdf
    • https://nijeliwawinezim.weebly.com/uploads/1/3/4/4/134497061/3b461.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.opentle.org
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/f0c160e0-75d1-4c37-98b5-dc30c1766b1c/95534930168.pdf
    • https://uploads.strikinglycdn.com/files/68df4cd7-5e25-42ff-92f5-ca2a07ff18e7/51006823845.pdf
    • https://s3.amazonaws.com/gizonukorad/hitman_blood_money_mobile_game.pdf
    • https://s3.amazonaws.com/fatikonavori/chaotic_sword_god.pdf
    • https://uploads.strikinglycdn.com/files/ad1e118e-4f76-4e9b-a868-23a19382687b/toque_de_bandera_letra.pdf
    • https://uploads.strikinglycdn.com/files/8abaa554-175f-4920-9cfb-55a3cae71481/53720433529.pdf
    • https://s3.amazonaws.com/rolefosiju/zekopezezab.pdf
    • https://uploads.strikinglycdn.com/files/365ced55-cca8-42ac-b942-d28ce146744f/77017038158.pdf
    • https://uploads.strikinglycdn.com/files/f7b501dc-edaa-41fc-9a30-7b6bffd86eea/shogun_sushi_menu.pdf
    • https://uploads.strikinglycdn.com/files/bac43798-c2c1-4973-afeb-c89200bd143a/gimipulotin.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.gnu.org/licenses/gpl.html

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c841.bin
44982e450fd1d541473de2ec633ca8beba383a295e32caadd4e201645fab985e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC841 4804 bytes
font_01_sfnt_off0000d868.bin
6dc2d9045770c40cfb4c26851effaa29e4896a23fdbf86caf7cd1f4b0e791eb9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD868 6664 bytes
font_02_sfnt_off0000e9f1.bin
bf8c40302340b46c32c9c98761e78a1b12e7ec84b0f30d34ff4660692681a19d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE9F1 12152 bytes
font_03_sfnt_off00010f4a.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10F4A 4324 bytes

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