Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e2505d9c3314c18…

MALICIOUS

PDF

84.1 KB Created: 2021-03-16 05:50:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: f538ae3e7679fcd37c19e2497ce4df6f SHA-1: 25373513d695fb3f44088cc6daedcb7eaee875a9 SHA-256: 0e2505d9c3314c1836f1bbb8350e55315ea351bfd6354bd31c88ea0f1ae5a087
184 Risk Score

Malware Insights

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

The PDF contains embedded links and is flagged by multiple heuristics as malicious, including a critical finding for linking to known malicious redirector infrastructure. The ML classifier also strongly indicates maliciousness. The document body, though heavily obfuscated, contains text related to 'Flash flight simulator hacked', suggesting a lure to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/wix?keyword=flash+flight+simulator+hacked In PDF document text
    • https://cdn-cms.f-static.net/uploads/4421943/normal_602275a36cf14.pdfIn PDF document text
    • https://cdn.sqhk.co/lanumakefu/pKbjgif/35888352966.pdfIn PDF document text
    • https://cdn.sqhk.co/dovoxukeni/uiaWiaq/hobby_lobby_locations_in_minnesota.pdfIn PDF document text
    • http://miwasigal.mywebcommunity.org/accounting_information_system_hall.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501374/normal_602ecf1393fe8.pdfIn PDF document text
    • http://tapasin.sportsontheweb.net/mezinipovizuxavisorinokov.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370767/normal_603b5c3934d60.pdfIn PDF document text
    • http://zhenskiizhurnal.ru/7314702563421tz9.pdfIn PDF document text
    • http://megahit.space/ti-30x_iis_convert_to_fractionswt4l.pdfIn PDF document text
    • https://cdn.sqhk.co/moxinivo/btjichf/hidden_object_secrets_of_the_mysterious_house_game.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://ba3a7bb5-edd2-4228-b29c-cf272df6a868.filesusr.com/ugd/bd1c09_4b21e7f126d3442986c492c56e5d40ad.pdf?index=trueIn PDF document text
    • https://a95edb9d-21e5-46e4-bb1b-b1fdf66a5dae.filesusr.com/ugd/09e34a_13ed22130eec4f72999bf8fe686f723a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/4054b5e8-8875-4bda-ae09-2b03c03d6f3d/how_to_plant_loose_leaf_lettuce_seeds.pdfIn PDF document text
    • http://fusozevukatamir.atwebpages.com/78913428473.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82917f4e-211f-4281-b403-2769e5da452c/gavedadabagigefozanaxupid.pdfIn PDF document text
    • https://45dcde1a-aed5-4138-b95e-a0f768a283bf.filesusr.com/ugd/89441e_303edc1af67a4c798797647c92e448cf.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/7443e319-09e3-40d5-b0b7-4c88405e6a43/what_is_meaning_of_howling_gale.pdfIn PDF document text
    • https://83d7d1d1-3661-4158-a2cc-78aa4aa39d08.filesusr.com/ugd/163759_64fcb2d9dbca4bf7a2d9dd2ddc89da88.pdf?index=trueIn PDF document text
    • https://bf6af823-cb0d-4ee8-9d5b-4f0b1de5ed24.filesusr.com/ugd/9eb187_d40adaf55d174f80983f87bf17917a06.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/7472a749-7d1e-422a-a6c0-cc5cc5d305c7/sawekepaz.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00011c64.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x11C64 21384 bytes
SHA-256: 2d7edb0ef2056917f67fe2f391763d2297463b5b146883e101ad8ea7e2bc92eb
font_00_sfnt_off0000e71c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE71C 5452 bytes
SHA-256: 87e04103b72832816951fd538dcf892b6812e9c5ae8d8b45746f147509ed37b4
font_01_sfnt_off0000f981.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF981 10204 bytes
SHA-256: a47e556e1759cbc4e1e620515f9ea7875f71f358198c2f0f0118f5468cff9e10