Malicious PDF — malware analysis report

Static analysis result for SHA-256 b80841677ccc655f…

MALICIOUS

PDF

88.8 KB Created: 2021-04-28 23:03:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: f63a50d5c2b70be55f167e3f69b2b2b6 SHA-1: e12e7528e435f7af2ed910d98c2f04cac9c39873 SHA-256: b80841677ccc655f92794ffc2034395062d4b6c647125ebb143af1e8a3a799df
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable domains, suggesting it functions as a link farm to distribute malicious content or phish for information. The presence of multiple external URIs and the 'link farm' heuristic strongly indicate a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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/strik?utm_term=deadlands+classic+20th+anniversary+edition+core+rulebook+pdf PDF link annotation
    • http://tublitalia.fun/21444492199m73vn.pdfIn PDF document text
    • http://businesshelpservice.com/wot_lorraine_40t_guidewj963.pdfIn PDF document text
    • http://delaem-sami.online/lady_popular_fashion_arena_cheatsc7j2m.pdfIn PDF document text
    • http://forkidsshop.online/download_game_king_s_empire_mod_apk7glv4.pdfIn PDF document text
    • http://ehaberdevlet.com/kexakejaoscly.pdfIn PDF document text
    • http://digitaltoolsfor.xyz/57764871781a91gh.pdfIn PDF document text
    • http://merovew.xyz/2138161143mrc0p.pdfIn PDF document text
    • http://xbet1.fun/37427459505cqdr0.pdfIn PDF document text
    • http://orbitan.fun/100_deadly_skills_the_seal_operatives_guide_downloado8de0.pdfIn PDF document text
    • http://specrazreshenie.com/62753363408j8mc3.pdfIn PDF document text
    • http://frukt.fun/gudanadobiloluzuwojazojhyn.pdfIn PDF document text
    • http://workbykoder.xyz/ellinika_biblia_downloadpblxi.pdfIn PDF document text
    • http://snail-case.store/word_365_character_count3oiv3.pdfIn PDF document text
    • http://storeplus.pro/68558282192zl1o9.pdfIn PDF document text
    • http://erse.xyz/what_does_9g_tronic_meanhxo3i.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/0cf839b8-ed39-4540-a1a2-8f3b84adb327/graphic_designer_job_salary_in_malaysia.pdfIn PDF document text
    • https://f0d491a7-7d72-4eea-bbd3-72ad31f48a9a.filesusr.com/ugd/1acdab_93a1cc405e164ef897c3a58bd3835263.pdf?index=trueIn PDF document text
    • https://43fe4710-460a-4ad3-90dc-2dd795c51528.filesusr.com/ugd/a32c20_023bde9c150d4bb197bffdd752a11e96.pdf?index=trueIn PDF document text
    • https://041f977c-1598-48cb-b578-3d63f550c8ab.filesusr.com/ugd/524ae3_e632b906049244faa5ca14babc6f4565.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e965dc7a-f531-4b57-9b56-1679d47e19c0/what_is_practical_inquiry_in_philosophy.pdfIn PDF document text
    • https://b354d503-40d1-4c97-84b4-bc0b16c12f35.filesusr.com/ugd/8c7d07_6793a67b05e0479db6c6237815f8c1be.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/05d320ff-4c62-4b8a-a6ec-720cc7d7c361/43037694877.pdfIn PDF document text
    • https://748e62c5-a849-4dff-87e7-3b5f74cb3522.filesusr.com/ugd/0df896_80a2ebccc1a1451ab79e1815166bb048.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/0432a40b-b62d-42c5-9ee2-4fa39b92ddb0/do_roku_have_xfinity_app.pdfIn PDF document text
    • https://1c2b20db-dbe1-4299-b4c0-f67d595d3b6c.filesusr.com/ugd/e71423_0fd45cf6d7fb4215973ce6d2b1c98726.pdf?index=trueIn PDF document text
    • https://7c9e9c40-2b96-4f88-8065-b5ff5e495659.filesusr.com/ugd/3bfcae_f8d9432284d44b88aaec5eae6372c4fa.pdf?index=trueIn PDF document text
    • https://810dce77-56ab-4324-823a-3549757f4eab.filesusr.com/ugd/1fad07_b6efbd8aa40d4c859f76deb6f27c8e36.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5a62a24-196d-4e02-9965-138c5f4d31fe/casio_illuminator_alarm_chrono_watch_manual.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_off00010ad9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AD9 5764 bytes
SHA-256: 630629ab04776b6d0e52d0f945884633cbb525c18a3cf2b90c0446a32a1a4ac0
font_01_sfnt_off00011e72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E72 11228 bytes
SHA-256: c28073a9150febcb5c9f92928ac96a13702d45bbe0d1c6d1ece3026977507934
font_02_sfnt_off000144ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x144EF 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

Open this report in the interactive analyzer, or submit your own file for analysis.