Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec719036a34828d6…

MALICIOUS

PDF

72.0 KB Created: 2021-06-14 05:19:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: de2d702e3d021d1685a01c18726891f5 SHA-1: 20bc3f62bad8286ab777004dcb5d070196cb5f9d SHA-256: ec719036a34828d67aca21aedbea383760d342c1e17b1d0d8078690d1ba2e069
186 Risk Score

Malware Insights

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

This PDF document is classified as malicious by ML models and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious sites. The document body, though heavily obfuscated, contains references to game cheats and financial advice, likely serving as a lure to encourage clicks on the embedded URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://garglob.ru/pbw?utm_term=geometry+dash+all+the+vault+codes
    • https://redawisifakaw.weebly.com/uploads/1/3/4/4/134481039/2510d9c9f.pdf
    • https://mifanalukuzesu.weebly.com/uploads/1/3/4/6/134688284/zuvup.pdf
    • https://dawawasokiju.weebly.com/uploads/1/3/1/4/131408838/3848030044.pdf
    • https://vikuregarune.weebly.com/uploads/1/3/4/5/134577585/7797050.pdf
    • https://jewigilimeb.weebly.com/uploads/1/3/1/4/131408849/296e14fce3c08.pdf
    • https://cdn-cms.f-static.net/uploads/4369524/normal_6020bbae382f6.pdf
    • https://jigazukenu.weebly.com/uploads/1/3/5/9/135964778/6031409.pdf
    • https://gipudakewisuvu.weebly.com/uploads/1/3/4/6/134665668/9375038.pdf
    • https://powilamalowigos.weebly.com/uploads/1/3/4/1/134131405/zerelopafaxeb-vorune-lozutozufaxalig.pdf
    • https://cdn-cms.f-static.net/uploads/4482413/normal_60331a682b2eb.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://lowigamivux.pbworks.com/w/file/fetch/145253241/how_to_get_money_fast_hay_day.pdf
    • http://febokipup.pbworks.com/w/file/fetch/145090977/free_call_of_duty_aimbot.pdf
    • http://vugufosenene.pbworks.com/w/file/fetch/144713634/gumuv.pdf
    • http://wojipag.pbworks.com/f/download_shoujo_city_3d_mod_apk_premium_card.pdf
    • https://uploads.strikinglycdn.com/files/1e89680a-1b23-4c1c-82ff-5c2614fb142f/lipumokorofodebegusosa.pdf
    • https://uploads.strikinglycdn.com/files/d3b7a63f-ef86-48bb-8658-a10faab1f1be/xupej.pdf
    • http://vipafuwusawe.pbworks.com/w/file/fetch/145116228/nice_to_meet_you_sub_indo.pdf
    • https://uploads.strikinglycdn.com/files/12e587c4-9446-444f-a63b-87356fca3fa8/how_to_set_my_sharp_atomic_clock.pdf
    • http://damopijos.pbworks.com/f/davifebogijemejis.pdf
    • http://vulifib.pbworks.com/f/short_story_with_questions_for_grade_5.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dbed.bin
b74d4258cfa6e10c20c975491ef264ff1bbd9ff5d41414e0ea55451321d8c671		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDBED 5372 bytes
font_01_sfnt_off0000ee14.bin
8e73a7bdc78de8269ecdd9d1cff29c6cb643bb0ec2a6e21933b216ad97ec81fd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEE14 10848 bytes

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