Malicious PDF — malware analysis report

Static analysis result for SHA-256 e18956ca6c14e88f…

MALICIOUS

PDF

76.6 KB Created: 2021-03-09 03:12:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 71849dbdb34c066a5a5dbb3d77e16be9 SHA-1: 9b2aa0ade29653f01a9db25c2160ac89d9a664f1 SHA-256: e18956ca6c14e88fb70bf7debb9294b6746119a2b56aa1818d38870d9ec17265
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9991

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/123?utm_term=super+mario+maker+2+buried+stones+guide PDF link annotation
    • https://cdn.sqhk.co/wuluzajiroz/dibhbib/mimpi_gigi_taring_atas_bawah_copot.pdfIn PDF document text
    • http://safilow.iblogger.org/how_to_find_the_magnitude_of_a_third_force.pdfIn PDF document text
    • http://mnatural.space/massimo_campanini7adpf.pdfIn PDF document text
    • https://cdn.sqhk.co/mugetawelumi/hehigi0/amazon_prime_now_app.pdfIn PDF document text
    • https://cdn.sqhk.co/guludagew/ikhjhgd/snowball_fight_clipart.pdfIn PDF document text
    • http://sanasojan.22web.org/primo_free_calling_app.pdfIn PDF document text
    • http://topchambre.xyz/what_is_the_maintenance_schedule_for_a_toyota_priusp2m5r.pdfIn PDF document text
    • https://cdn.sqhk.co/lokiwejawe/ejh3y80/sadapoxuxolaxenazopa.pdfIn PDF document text
    • https://cdn.sqhk.co/gapalagabig/whchds5/drill_down_excel_pivot_chart.pdfIn PDF document text
    • http://limecash.xyz/avatar_s_love_piano_sheet_musicns5gz.pdfIn PDF document text
    • http://instas.site/46335617043wpvr9.pdfIn PDF document text
    • http://xadejidigakezu.iblogger.org/guitar_chords_basic_for_beginners.pdfIn PDF document text
    • http://nakanilo.club/duxixeja9qed2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://0aed7b51-d02b-4864-a6bb-b478bb809667.filesusr.com/ugd/fbdaab_ee8abeb771cb4e71a7fa05b7ead17aa2.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/97add9a8-069d-4c32-b6a7-f2a228b419a2/marketing_entry_level_jobs_nyc.pdfIn PDF document text
    • https://438c9214-13ba-44a2-8469-a4c97ff43377.filesusr.com/ugd/5d46a0_8c57d65b7d7d45ea93473c0cfeaa6dba.pdf?index=trueIn PDF document text
    • https://6e678f60-abc6-404c-883a-cd1729fdffee.filesusr.com/ugd/e4291f_8aadcf1d36f3473d95d17f60a9f0be85.pdf?index=trueIn PDF document text
    • https://1d942ef5-affb-47d8-8f99-70a3d187b733.filesusr.com/ugd/3283b0_4ec6f611e52046e098405e3ea6cb2cfa.pdf?index=trueIn PDF document text
    • http://sefigafufobus.epizy.com/56336607877.pdfIn PDF document text
    • https://65de77fc-0341-4fd2-89b2-cd6b005a91de.filesusr.com/ugd/cf79db_b36c821e10a6494681094791f4e3643a.pdf?index=trueIn PDF document text
    • https://eb72eaa1-ef55-40a3-a653-f6d21bccf295.filesusr.com/ugd/54913d_ba1449f2b4a34432ad8f0301e7da3706.pdf?index=trueIn PDF document text
    • https://183df7f2-4185-4ca0-bfcc-33b39bc842f1.filesusr.com/ugd/9ac34a_7c7e6af125004d7c92075c4c5374c395.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/3389e273-c56d-4dd4-aafa-901bdd376c8f/6879620880.pdfIn PDF document text
    • http://padijajuvon.rf.gd/does_samsung_galaxy_s8_work_with_straight_talk.pdfIn PDF document text
    • https://ab2ac9d4-4772-4872-829d-c19fde0a4f90.filesusr.com/ugd/b919b3_c22f0e619e2f4cdea2d5ffe2e5fcf101.pdf?index=trueIn 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_off0000e9d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9D8 5688 bytes
SHA-256: d62362a264f4276174059d94510e695066c8983b358c06a9baa34a789882bdba
font_01_sfnt_off0000fd19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD19 11628 bytes
SHA-256: ca59af0d150cc12cf723764a77e3be3c8e445eeff576f5943e65dc06a0e4ac49