Malicious PDF — malware analysis report

Static analysis result for SHA-256 90ba64edc00443ee…

MALICIOUS

PDF

85.9 KB Created: 2020-11-11 05:54:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 96800eab85e03ed24195fbc5a6c78f9e SHA-1: b69ea55e93fedccef09903df7fa2e60ffcf70ca6 SHA-256: 90ba64edc00443ee376419b23cd0c750dbe396b3b18d65e5769b906ff01f96a9
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including PDF_SEO_LINK_FARM and ML_NYX_PDF_MALICIOUS, and detected by ClamAV as Pdf.Phishing.Trojan. The presence of numerous external links, including one pointing to 'traffset.ru', suggests a phishing or SEO manipulation attempt. While no scripts were explicitly extracted, the PDF structure and link farm indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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
  • 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://traffset.ru/aws?keyword=witch+queen+black+clover
    • https://cdn-cms.f-static.net/uploads/4415080/normal_5f9edfc98f637.pdf
    • https://cdn-cms.f-static.net/uploads/4407316/normal_5f985bd4c6d53.pdf
    • https://cdn-cms.f-static.net/uploads/4369495/normal_5f95b35f223b9.pdf
    • https://xonuvalax.weebly.com/uploads/1/3/1/4/131437330/549893a6c742cca.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/tirimofufemukat/ultra_testo_max_testosterone_booster.pdf
    • https://s3.amazonaws.com/mubefula/51510682218.pdf
    • https://s3.amazonaws.com/sefiwegegagu/the_essential_guide_to_becoming_a_master_student_ellis.pdf
    • https://s3.amazonaws.com/kawotexulozax/4e_monk_guide.pdf
    • https://s3.amazonaws.com/fajeloninesitel/vanguard_backdoor_roth.pdf
    • https://s3.amazonaws.com/fasanag/backlash_full_book.pdf
    • https://s3.amazonaws.com/robumuduluwise/gefalolizorutasakoxe.pdf
    • https://s3.amazonaws.com/sugaguxagu/zanufofabad.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000107c7.bin
13743b71c50d959fa3b7317d20d36ca93cf42d60b46f89cb15742d440b4b60fd
pdf-font-stream PDF embedded font (sfnt) at offset 0x107C7 3624 bytes
font_01_sfnt_off0001148e.bin
cdc7946c56af4f1c4c75079c0271593c32d06744ca04b4f00478078b0b6457d5
pdf-font-stream PDF embedded font (sfnt) at offset 0x1148E 5112 bytes
font_02_sfnt_off00012607.bin
6b3ebb7e86664e51101d26a7c687e00acb1c5bc2c016279d243ac1aad53006e3
pdf-font-stream PDF embedded font (sfnt) at offset 0x12607 10348 bytes