Malicious PDF — malware analysis report

Static analysis result for SHA-256 06663295e8836b3a…

MALICIOUS

PDF

74.9 KB Created: 2021-03-17 15:53:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1d9b946542c09d396d2da430b0198f3c SHA-1: 573b6dbe83b6bfb184432dc355c3eaa1e7738b04 SHA-256: 06663295e8836b3a9e7b2aaaea31ced54b2f127e8412fd7233757c94b09a641a
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier with high confidence. It contains a large number of external links, many of which are likely part of a link farm designed to obscure malicious intent. The document body is heavily obfuscated, but the presence of external URIs and the overall heuristic firings suggest it is used to redirect users to potentially malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://seumenha.ru/award?keyword=booklet+creator+mac+pdf
    • http://xonibiz.22web.org/material_safety_data_sheet_of_sodium_hydroxide.pdf
    • http://regvoolkim.website/mekexetutuwohyhlt.pdf
    • https://vafukomoruf.weebly.com/uploads/1/3/4/8/134862603/somaxef.pdf
    • https://votilolezin.weebly.com/uploads/1/3/4/3/134307270/6162897.pdf
    • http://dogorove.22web.org/jumuna.pdf
    • http://megalit-korolev.ru/pnl_la_magia_en_accin_richard_bandler_y_john_grinderxjz0e.pdf
    • http://mon-cmso.best/dagafuzevawusapy1tf6.pdf
    • http://instgrmmverifiedbadge.com/28315282077loz2k.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://dogirajuwuxo.epizy.com/84539396542.pdf
    • https://s3.amazonaws.com/kabisebax/best_14_foot_trampoline_with_enclosure.pdf
    • https://uploads.strikinglycdn.com/files/0f73a1d2-f7f7-4ba8-9b90-b2763f60618d/33537169683.pdf
    • https://uploads.strikinglycdn.com/files/10639c3b-819f-4a17-83b2-806e0029928a/how_much_is_popcorn_machine_cost.pdf
    • https://uploads.strikinglycdn.com/files/cc0b4d10-fb38-4ee5-96f9-cb884049f541/wulorubaziviritupu.pdf
    • https://s3.amazonaws.com/lanorolowu/h2020_coordinators_day_amendments_and_reporting.pdf
    • http://vuvinumebipoje.rf.gd/sangean_wr-2_user_manual.pdf
    • https://s3.amazonaws.com/nisoxow/ms_project_2013_free_download_with_crack_32_bit.pdf
    • https://s3.amazonaws.com/fedojigudaj/adding_three_fractions_with_different_denominators_worksheet.pdf
    • https://uploads.strikinglycdn.com/files/84b4d6c9-44d4-445c-a057-0495f7a669aa/the_book_of_jasher_chapter_14.pdf
    • https://s3.amazonaws.com/mixanaz/mopupugepisiredu.pdf
    • http://jiguluvosasibun.epizy.com/nizixaviv.pdf
    • https://uploads.strikinglycdn.com/files/d4125d47-3515-49a4-a100-45c12ae32c48/bedejeru.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e5bb.bin
e7a39e70738d4edb452f434632eada1824188cb95a38d1634ef5d07985ca4887		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE5BB 5236 bytes
font_01_sfnt_off0000f77c.bin
2efda25ec4697f83a8e62d594abbf1402eefb8628eae92285d5daabd1e2afc8a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF77C 11504 bytes

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