Malicious PDF — malware analysis report

Static analysis result for SHA-256 5bbe52a5c56342bd…

MALICIOUS

PDF

114.8 KB Created: 2021-02-16 12:49:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: a1049ae11ef9f23ef3cecd6696cd430c SHA-1: 84aefc64db69a71c4099de444373ca85742d5998 SHA-256: 5bbe52a5c56342bd01303b23484bac70e7adc9b0567eceee7f2210db6b950eaa
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to potentially malicious domains, indicating a link farm or phishing attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. The document body, though heavily obfuscated, appears to be a lure related to a workbook, directing users to a URL that is likely part of a phishing campaign or malware distribution.

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
  • 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://baarspo.ru/strik?utm_term=anthony+robbins+personal+power+ii+workbook+pdf PDF link annotation
    • https://nugilura.weebly.com/uploads/1/3/5/3/135317706/9b63a054045a1.pdfIn PDF document text
    • https://muxavitegujun.weebly.com/uploads/1/3/1/6/131637584/cfa71cadb.pdfIn PDF document text
    • https://kupifima.weebly.com/uploads/1/3/0/7/130775493/ac2fdb3.pdfIn PDF document text
    • http://wowitaly.space/blessing_tv_tamil_christian_songs_freeaw7sj.pdfIn PDF document text
    • http://spainsale.pro/17358465009jvgge.pdfIn PDF document text
    • http://pasendapp.online/kavizuxosupogoliwejuwuxoauyzg.pdfIn PDF document text
    • http://return-0.com/33737759278wis4s.pdfIn PDF document text
    • http://allostar.buzz/wobevezumakejarigisiwozqtp6.pdfIn PDF document text
    • http://amsidgi.xyz/23200462345qmkz3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/rimepusox/vofamafuxewenuvul.pdfIn PDF document text
    • https://s3.amazonaws.com/vidadaviwal/name_on_cake_app.pdfIn PDF document text
    • https://s3.amazonaws.com/jepinebawo/how_to_do_estimation_in_the_agile_project.pdfIn PDF document text
    • https://s3.amazonaws.com/fosagoba/2550032370.pdfIn PDF document text
    • https://s3.amazonaws.com/jazofi/play_store_app_old_barjan.pdfIn PDF document text
    • https://s3.amazonaws.com/xijalovelokolep/stonehenge_guided_tours_from_salisbury.pdfIn PDF document text
    • https://s3.amazonaws.com/kotidox/django_template_url_optional_parameter.pdfIn PDF document text
    • https://s3.amazonaws.com/zemunomipazikez/47341703647.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_off000184e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x184E5 5516 bytes
SHA-256: ec95f575dff3e98db3a742cff9b89a40dbc21284b038a16ef23fda378948a617
font_01_sfnt_off000197b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x197B4 11104 bytes
SHA-256: 6e17d1478e33d1cdbabf0bf95f6b209cf2ddc83c04676b3259340bcb0dd0bc6a

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