Malicious PDF — malware analysis report

Static analysis result for SHA-256 32b24edbc1887e2e…

MALICIOUS

PDF

77.1 KB Created: 2021-04-02 05:45:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 0e892c727cbefe253c29165ef82f3fa7 SHA-1: 85b4abb97d63c74e3fb2fb9b15ee295a62e19595 SHA-256: 32b24edbc1887e2e342b7e09169f200dc65096b6915efefcf43d134b5aa2aff7
226 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. It uses a password-protected-archive lure. 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 0.9996

Heuristics 7

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://druttle.ru/wix?keyword=vex+3+hacked+free+games PDF link annotation
    • http://lnstagram-helping-centre.com/bleach_hado_90lsj58.pdfIn PDF document text
    • http://gipovasota.sportsontheweb.net/australian_english_pronunciation.pdfIn PDF document text
    • http://oneplusonemain.xyz/how_to_fix_a_fridge_if_its_not_coolinglfl4t.pdfIn PDF document text
    • http://myimperfectmomlife.com/dell_inspiron_n5010_bluetooth_drivers_for_windows_8.1_64_bitws012.pdfIn PDF document text
    • http://xiruzox.mygamesonline.org/basic_computer_tutorial_for_beginners_ppt.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba3c4da9-8d04-4ff6-8786-479f7df1f3fd/house_of_night_otherworld_series_book_4.pdfIn PDF document text
    • http://jerajunegadadu.rf.gd/52189983247.pdfIn PDF document text
    • https://48cc712b-de5e-493e-a198-f8962849e22b.filesusr.com/ugd/d2751c_fc187ebc976941dc947fbfbc0061ed4a.pdf?index=trueIn PDF document text
    • https://1237a3da-0b33-4890-9ba9-974507bf2590.filesusr.com/ugd/3e0cb9_e31baa037f4445f9854d9f2619050e52.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a6525f8-888f-412a-8b57-b8a0309360fc/gypsy_moth_identifying_characteristics.pdfIn PDF document text
    • https://85ed388a-52e0-4e79-9737-9d4b769dda71.filesusr.com/ugd/bb10c5_a00716cfe82a4d5a8e5ee2d9a706b057.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4214c32-34c8-4bb2-b80a-0ff281642691/what_is_the_best_brand_of_watch_winder.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/787d510c-3061-45d5-8a80-e56aa91dd2a4/37306486214.pdfIn PDF document text
    • https://6440a9f6-5e82-4153-977b-4ffe9374ec4a.filesusr.com/ugd/7182f3_5b1f96e1804c49dca631b8be5ed3b827.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/4da2efb7-1098-4e73-b072-1d8a976dd480/net_interview_questions_for_2-3_years_experience.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72010b1e-4a28-4124-ac5b-5a7de5b016f5/4246173032.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cee3d032-56e8-4ca4-9bfa-e7a71aec7936/mixotowawi.pdfIn PDF document text
    • http://vakorizu.epizy.com/jagusomelilanas.pdfIn PDF document text
    • https://6e678f60-abc6-404c-883a-cd1729fdffee.filesusr.com/ugd/e4291f_239f80c81fe4431a81be3822179db6de.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/df9bfcc7-962c-424b-8894-56fd3ff8cb19/how_do_i_know_what_size_grill_cover_i_need.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9cee6afb-cd62-4a60-a26a-2a3e69098b00/4056281959.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d5a07e4-b588-43ab-a551-a7ef096d4835/nc_math_1_eoc_released_test_answers_2020.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_off0000ee4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE4B 5664 bytes
SHA-256: 08fa216c10a0a3a6a1d08680e33b553eb0f2ac1693d6c9ea4a3fdfcedb1a3826
font_01_sfnt_off00010179.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10179 10576 bytes
SHA-256: c7a99fee1937d73f788e3a56325263db8edc17a20f3f73ddd3f307e0dd17120a