Malicious PDF — malware analysis report

Static analysis result for SHA-256 0025da300fbe4f15…

MALICIOUS

PDF

72.2 KB Created: 2021-05-12 12:05:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: f7928ddc27938b80e465a482d57845f0 SHA-1: 6142731cb9c0e249d1ba5216dde0b6551a3f8b30 SHA-256: 0025da300fbe4f15f2fe1093bd3b8171c047baf8d20e27dc53dae0f583ed491c
154 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, with the primary malicious URL being jumiwimov.ru. This behavior is indicative of a link farm or SEO spam campaign designed to direct users to potentially harmful content. ClamAV detection and ML classification further support its malicious nature, suggesting it's a phishing or trojan distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7529

Heuristics 4

  • 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
  • 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://jumiwimov.ru/strik?utm_term=what+does+visual+cues PDF link annotation
    • https://cdn.sqhk.co/nutanujel/gdhgjhf/fitbit_versa_2_special_edition_vs_versa_3.pdfIn PDF document text
    • https://cdn.sqhk.co/vumuwilaj/ihZUc3V/world_war_1_and_2_years.pdfIn PDF document text
    • https://cdn.sqhk.co/tagodepa/gijgWJk/38027950002.pdfIn PDF document text
    • https://cdn.sqhk.co/zizenozi/haauxhd/ritixupu.pdfIn PDF document text
    • https://cdn.sqhk.co/ripalufix/iwgjgeJ/batman_joker_comics.pdfIn PDF document text
    • https://cdn.sqhk.co/jabosuve/aiinEXZ/music_plus_mp3_player_apk_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/dizukenepu/QhfQc3i/gumavosam.pdfIn PDF document text
    • https://cdn.sqhk.co/rifebonapesi/jdjdhhB/42636611284.pdfIn PDF document text
    • https://cdn.sqhk.co/pibilebomek/jdjbsjg/zuvevabanewejojo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://d64d5b41-a66a-4b78-b87f-0feaf8e9cf76.filesusr.com/ugd/cf1aed_bb0c8b27e9b14631897cb4f941e9f562.pdf?index=trueIn PDF document text
    • https://9ebe8999-295a-4f11-87dc-c96f3e1b46ff.filesusr.com/ugd/8de238_7d9626b7299a440cb0c4d49702743ab9.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dopugaxelelema/14216964412.pdfIn PDF document text
    • https://s3.amazonaws.com/xebuvuwov/29732328097.pdfIn PDF document text
    • https://7a6021ad-ea99-40b3-bafb-6570e045b460.filesusr.com/ugd/527ec5_04334d4a56ed4adea6bf91c6c1617227.pdf?index=trueIn PDF document text
    • https://2a983b51-2e13-4971-8c1f-a5bca3ab4353.filesusr.com/ugd/e1a791_ff40be80dd8c4a9bac96f0688b6fb854.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xokebore/46757908952.pdfIn PDF document text
    • https://1c019786-7048-4615-837a-ae53f087c4ae.filesusr.com/ugd/8b4172_a1f96248e99641d7a4cf7d82e77b7b70.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nosepevozux/self_confident_meaning_in_english.pdfIn 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_off0000f910.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF910 5004 bytes
SHA-256: 266185bd36ff0eb681a237994d3be3bf5de471985ebb81aacaaaa6db910c3d78
font_01_sfnt_off00010a1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A1D 1800 bytes
SHA-256: a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620