Malicious PDF — malware analysis report

Static analysis result for SHA-256 62a5fb9989481308…

MALICIOUS

PDF

78.2 KB Created: 2021-04-01 20:53:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: f11907364b2c5e5ef12330bac159a745 SHA-1: 5c25a819d2ae2f191147475cc2301dc7ae9b24f4 SHA-256: 62a5fb9989481308e71e797f4eaf63f01825c0ee24caca0cb3cb4774bde3331c
96 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, identified as a PDF SEO link farm. One of the primary links, 'https://nipisod.ru/strik?utm_term=are+summer+waves+pools+good', appears to be a malicious URL. While no scripts were extracted, the structure and numerous links suggest an attempt to drive traffic to potentially malicious or ad-heavy websites, possibly as a lure for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 4

  • 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
  • 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://nipisod.ru/strik?utm_term=are+summer+waves+pools+good PDF link annotation
    • https://cdn.sqhk.co/tewisifupib/xhgf4gi/jeboramumevotapepet.pdfIn PDF document text
    • http://miwasigal.mywebcommunity.org/apush_chapter_23.pdfIn PDF document text
    • https://cdn.sqhk.co/pidikuso/gjCibnH/steam_games_for_macbook_air.pdfIn PDF document text
    • https://cdn.sqhk.co/jixavome/Nic9CfD/59658417711.pdfIn PDF document text
    • https://cdn.sqhk.co/matikefateri/hjggYgj/documentaries_universo_online_free.pdfIn PDF document text
    • https://cdn.sqhk.co/lugizumevemu/ifogdVl/lawatowotuvewev.pdfIn PDF document text
    • https://cdn.sqhk.co/ragejeli/jjvieic/11588027680.pdfIn PDF document text
    • https://cdn.sqhk.co/xufojidaju/cglhe7Y/my_bunny_runs_in_circles_around_me.pdfIn PDF document text
    • https://cdn.sqhk.co/letarezetap/BgfBgji/jidetur.pdfIn PDF document text
    • https://cdn.sqhk.co/ravusigi/hZ6ghTU/minecraft_mods_1._16.pdfIn PDF document text
    • https://cdn.sqhk.co/zotofoza/ifUibBs/nozepokevizosureredub.pdfIn PDF document text
    • https://cdn.sqhk.co/subilikiwi/gcK3Cib/30634982054.pdfIn PDF document text
    • https://cdn.sqhk.co/raxoxawupej/iiR5ii9/vujixigegajejik.pdfIn PDF document text
    • https://cdn.sqhk.co/fomezawelud/heiatjg/86072705798.pdfIn PDF document text
    • http://vuvulusigi.scienceontheweb.net/business_development_action_plan.pdfIn PDF document text
    • https://cdn.sqhk.co/tefegegesuxe/eC49ihJ/4908957991.pdfIn PDF document text
    • https://cdn.sqhk.co/butiluluvuk/jWhjrdY/da_approval_parramatta_council.pdfIn PDF document text
    • https://cdn.sqhk.co/vomemubevu/pcKgggd/19243736826.pdfIn PDF document text
    • https://cdn.sqhk.co/jirowolad/7HjhYgj/zazom.pdfIn PDF document text
    • https://cdn.sqhk.co/ruzivogawa/fHmgfdt/highway_traffic_racer_fever_traffic_racing_game_download.pdfIn PDF document text
    • https://cdn.sqhk.co/busumodofu/hjEuR4f/lurudemiv.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://ec8c99fd-5413-4e38-b6a0-2ccbba71fc6f.filesusr.com/ugd/de02f3_35ba7a771f9a4794ab2ebce4586afbab.pdf?index=trueIn PDF document text
    • https://e4fb9bf1-a3d6-4767-9bf2-2a1021e5dc09.filesusr.com/ugd/53cfc7_85a2d3e3824f4a83a66330ade24efb2a.pdf?index=trueIn PDF document text
    • https://c18d7360-3707-4bf1-9d6f-52ba7510fa17.filesusr.com/ugd/76cb06_214524ef6ee845549599f40fb2b42f97.pdf?index=trueIn PDF document text
    • https://1afae0f6-9e35-4dc9-9db7-5dbf78511926.filesusr.com/ugd/afe78f_fed8055b490b45d390aa745fa7220c91.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_off0000f4ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4CE 5420 bytes
SHA-256: 3aadbfeb5f0ec35bd59b41b41bfe8814a28a2b920411206faf697d8cc1bcc5e0
font_01_sfnt_off0001073b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1073B 10596 bytes
SHA-256: 0b6c5e154ff38d7599b4ba587eeacd8cb9eb81a1a274f95dc1dead11b40b987c

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