Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0ad7a58e950d758…

MALICIOUS

PDF

64.8 KB Created: 2020-11-30 04:26:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 70267bca85412a89978e319abb9cfc9a SHA-1: d32945b678b25df00fc790d3d1d363c57da799cd SHA-256: b0ad7a58e950d758e6f0555a2a402865928ab618863b0fdb657f217e9a9eea80
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://traffine.ru/123?utm_term=last+line+of+defense+hacked+arcadeprehacks PDF link annotation
    • https://vefarekosisag.weebly.com/uploads/1/3/4/7/134722728/nudatulevojebasa.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/faluzotixupi/53727830737.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e04745a6-d40a-4eef-9110-ab1993076d28/lego_emerald_night.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/84d9f0c9-5767-4114-b36f-36aac4ba6044/hot_air_balloon_rises_gas_law.pdfIn PDF document text
    • https://s3.amazonaws.com/gomakobez/bhagavad_gita_in_tamil_chapter_18.pdfIn PDF document text
    • https://s3.amazonaws.com/nosepevozux/jotevoz.pdfIn PDF document text
    • https://s3.amazonaws.com/bufipevuril/convert_drawable_image_to_bitmap_android.pdfIn PDF document text
    • https://s3.amazonaws.com/zikeko/88575515513.pdfIn PDF document text
    • https://s3.amazonaws.com/tuzamada/reordering_of_sentences_worksheets_for_class_10.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/98ede974-4a87-4ab0-baff-23a5037cd355/frindle_vocabulary_activities.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8062a545-d0af-4985-bd15-c38e8c443f09/nuzulopukumabet.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_off0000bfc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBFC6 5248 bytes
SHA-256: 69a908acadcab7c009e4092a5f3fbe3b394e0f25bd9b698c1b59a81aac867e41
font_01_sfnt_off0000d19d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD19D 10868 bytes
SHA-256: 3c283ce9b618b011371541012b8c0210d4edf90fef6106cf5a46c4e424bd9471