Malicious PDF — malware analysis report

Static analysis result for SHA-256 66d1ebad44ea077b…

MALICIOUS

PDF

65.1 KB Created: 2020-12-15 14:43:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 1cc121b0c47b628c9191f74cb6518cec SHA-1: 59be0b0ac6fdd98fcef28aec03342ff6c78d4613 SHA-256: 66d1ebad44ea077bf79d914f84a5aaf04151028378b560960ccadeabb7b728ee
214 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one specifically identified as a malicious redirector. The heuristic firings indicate a high likelihood of phishing or malicious redirection, leveraging a link farm strategy. While no scripts were explicitly extracted, the presence of embedded URLs and the ML classifier's strong flagging suggest malicious intent, likely to redirect users to phishing or malware-hosting sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • 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=yuneec+typhoon+g+manual In PDF document text
    • https://pibofarijefi.weebly.com/uploads/1/3/4/6/134648305/81e52068dc713a4.pdfIn PDF document text
    • https://latopilufazi.weebly.com/uploads/1/3/4/0/134017217/f75b4a16.pdfIn PDF document text
    • https://lupunudarowujak.weebly.com/uploads/1/3/4/5/134599946/5ca9dea58d93607.pdfIn PDF document text
    • https://vunisanelebori.weebly.com/uploads/1/3/3/9/133999195/doxisoriz-surelifowave-bugaxapal-xefava.pdfIn PDF document text
    • https://nasefowiwawenug.weebly.com/uploads/1/3/4/1/134109082/tipuxubugu_vemur.pdfIn PDF document text
    • https://ropojagininu.weebly.com/uploads/1/3/4/6/134635708/5760711.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/0ef793c9-ff6b-46ec-ba4d-3f29d37822fa/english_regents_january_2018_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6513097-2ce0-4454-b032-2447c0fd25f4/zovuzisisaxim.pdfIn PDF document text
    • https://s3.amazonaws.com/firigugixujotov/guardians_of_the_galaxy_3_filming_date.pdfIn PDF document text
    • https://s3.amazonaws.com/pazovugal/paper_mario_randomizer.pdfIn PDF document text
    • https://s3.amazonaws.com/lanorolowu/vewojip.pdfIn PDF document text
    • https://s3.amazonaws.com/punagilelabon/possessive_pronouns_worksheet_year_6.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5b4ed405d5340f34a953a/t/5fcdf21d260a660a6bfeafb9/1607332381903/98640615891.pdfIn PDF document text
    • https://s3.amazonaws.com/xubifupi/kodi_on_ps4_pro.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_off0000c11c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC11C 5136 bytes
SHA-256: 047cc486716a775f2b19805b7dbf648ea3e3f39537675829d3d76ab3e3306ab7
font_01_sfnt_off0000d282.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD282 10848 bytes
SHA-256: 49cbae1c07b5d7e6f4b4a6b14e1c69126960314c25a8023bc0d0e19f459f695a

Open this report in the interactive analyzer, or submit your own file for analysis.