Malicious PDF — malware analysis report

Static analysis result for SHA-256 2185f4649b8054b3…

MALICIOUS

PDF

73.1 KB Created: 2020-12-11 01:25:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fd5a3e37acd41a60270cac0e0811af62 SHA-1: 60b82b7f8b60c37fd82a3b11f1413bb9dca87229 SHA-256: 2185f4649b8054b314195d5dbebb8764c82efdfc62136b4c7930cd4fb2984b71
214 Risk Score

Malware Insights

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

The PDF contains a mass of external links, including one pointing to a known malicious redirector. The document body, though heavily obfuscated, appears to be a lure related to an iPhone battery diagram. The presence of numerous links suggests an attempt to drive traffic to potentially malicious sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://gettraff.ru/strik?utm_term=iphone+5c+battery+diagram
    • https://wivujugojuz.weebly.com/uploads/1/3/4/8/134883460/4520272.pdf
    • https://nidupivulef.weebly.com/uploads/1/3/4/0/134042353/6035444.pdf
    • https://static.s123-cdn-static.com/uploads/4502246/normal_5fced57763aca.pdf
    • https://nitetemefugek.weebly.com/uploads/1/3/4/7/134772401/8090123.pdf
    • https://cdn-cms.f-static.net/uploads/4369655/normal_5f87c838cfaac.pdf
    • https://masugofesobix.weebly.com/uploads/1/3/4/6/134656422/suvanuluzu.pdf
    • https://nodopotol.weebly.com/uploads/1/3/4/0/134018708/kusifopizeb.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static1.squarespace.com/static/5fc10b921452f90b7fe62c2d/t/5fc9f68ee262c0159466644c/1607071377513/baby_adopteren_sims_4.pdf
    • https://uploads.strikinglycdn.com/files/adb15ded-ce95-4073-8fdd-7898743b2291/baresutiwarufefesonag.pdf
    • https://static1.squarespace.com/static/5fc5693fbe9b693951291b9c/t/5fc8dfb4d6e0cc37e34767c4/1606999988864/241845360.pdf
    • https://uploads.strikinglycdn.com/files/f8b518c6-d850-4ba7-898c-38e5ed9e2fa9/part_of_sentence_worksheet.pdf
    • https://static1.squarespace.com/static/5fc298b02bbd7406581167d1/t/5fcac5ef7626e35e5d7c7cab/1607124464418/nafodixetelini.pdf
    • https://uploads.strikinglycdn.com/files/d90fcb04-9524-42a6-aef0-63e32e16a374/1999_jeep_grand_cherokee_parts_diagram.pdf
    • https://static1.squarespace.com/static/5fcdfed041ec4a2cc0e015f4/t/5fcf62ad1901dd4d2ed3e4f7/1607426733669/virgin_radio_italy_online.pdf
    • https://static1.squarespace.com/static/5fc00a03c6229360eca839ab/t/5fc0fdbcf8cdb769c606137a/1606483389987/67356949352.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dfc1.bin
f21562dd1105adb0de4fb9b01bcdef16be42a971ce7bff38863a8d5a4d7e3c22		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDFC1 5580 bytes
font_01_sfnt_off0000f29c.bin
2616e9fb8f8cc1358b69a5a2f1141409b6fd712bbf4ef677e9a51361bdf77c39		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF29C 11108 bytes

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