Malicious PDF — malware analysis report

Static analysis result for SHA-256 a90031ab410187bb…

MALICIOUS

PDF

81.0 KB Created: 2021-04-03 06:46:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: e075ca0aadcccdf3a7f64e396589c201 SHA-1: e08a50b21aa706d08505271ed64ff6ca518b89ae SHA-256: a90031ab410187bb32b659dacdeccc0b9d8d47da319f7659691f4b79cc68dd1c
66 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable domains and are likely part of a link farm designed to attract users searching for free software. The ML classifier strongly indicates maliciousness, and the heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' confirms the suspicious nature of the URLs. While no scripts were extracted, the document's structure and embedded links suggest it's a lure for malicious downloads or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 4

  • 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://bologen.ru/award?keyword=pdf+text+editor+software+free+download+full+version PDF link annotation
    • http://naturalm.space/moments_choose_your_story_mod_apk_1.1.5k2q02.pdfIn PDF document text
    • http://autokenn.com/hp_laserjet_4200_set_ip_addresshmga2.pdfIn PDF document text
    • http://dutilulamav.iblogger.org/1291783335.pdfIn PDF document text
    • http://animoney.xyz/ben_10_protector_of_earth_cheatsd9a1o.pdfIn PDF document text
    • http://tujijamutibe.sportsontheweb.net/definition_of_forensic_accounting.pdfIn PDF document text
    • http://shop-kid-toys.online/200063206slggc.pdfIn PDF document text
    • http://vidoxilaxugak.22web.org/yamaha_mg102c_review.pdfIn PDF document text
    • http://exampl1214.com/63057122821q7as4.pdfIn PDF document text
    • http://lejifip.sportsontheweb.net/folding_adirondack_chair_plans_free.pdfIn PDF document text
    • http://xuzotudaraderuf.mypressonline.com/researchgate_request.pdfIn PDF document text
    • http://loxokunetuladi.66ghz.com/arya_movie_songs_free.pdfIn PDF document text
    • http://shoop-ff.ru/38447721157iwjyj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xaredekol.epizy.com/xajofafuda.pdfIn PDF document text
    • http://serumisa.epizy.com/sales_spreadsheet_ideas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34684f7a-0c1a-449a-b55f-a1903ade18d4/26_roadmaster_granite_peak_womens_bike_18-speed.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc157f0f-6773-4e67-bbc5-832666fdcadf/love_in_the_time_of_cholera_quotes_about_love.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6e82e48-7161-45f1-ba6f-39f1c8583ab4/71894765217.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e0088fa6-efb0-4070-8f5f-fd27fe975568/words_that_start_with_zero.pdfIn PDF document text
    • http://tipipigi.atwebpages.com/rofunulolitaduwu.pdfIn PDF document text
    • http://miwewugewu.atwebpages.com/9200256051.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a80c079d-5d14-4ad6-82cc-3c96e05cf0e3/cant_stop_the_feeling_justin_timberlake_lyrics_meaning.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f12ad2f-e765-4605-8e2d-27fab92bc306/does_comcast_offer_wireless_cable_boxes.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f47b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF47B 2960 bytes
SHA-256: 00c0a141202c10936ceac8b8df9df75720096dbedde9c5fde8d9f3447cbb363c
font_01_sfnt_off0000feea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEEA 5120 bytes
SHA-256: 08a836f28f0a5468842a808cef6090ab901a0e1e22264751161a59484d79c14f
font_02_sfnt_off00011085.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11085 10956 bytes
SHA-256: 733acbc16ec8956c9ffcd0b05a5e0fdfe653ea26789589741163bd54dd5cb999