Malicious PDF — malware analysis report

Static analysis result for SHA-256 dca45c0ef81dc6da…

MALICIOUS

PDF

78.0 KB Created: 2021-03-10 11:38:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: e913674c3dbdead7b960835e84a80d07 SHA-1: b3deb0be55b9d14365c0dccff30f21c56b9e9a35 SHA-256: dca45c0ef81dc6da40136f829d3ff8bd3498c524d94f6d7819b57bcc075e2fa0
126 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to 'baarspo.ru' which is associated with downloading a game modification. This URL, combined with the 'ML_NYX_PDF_MALICIOUS' and 'ClamAV: Pdf.Phishing.Trojan' heuristics, strongly suggests a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains keywords related to downloading a game, aligning with the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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/wix?keyword=download+clash+royale+mod+apk+sofdl PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4413975/normal_60437ef89a8a7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376088/normal_6015c4d6e0d28.pdfIn PDF document text
    • https://cdn.sqhk.co/wifavizen/hcYjgyQ/ninukinefinisetoxuf.pdfIn PDF document text
    • https://cdn.sqhk.co/lixipadiwel/JHYEnje/slot_car_trainer_professor.pdfIn PDF document text
    • https://cdn.sqhk.co/vudararemane/hhgigf6/bomb_chicken_switch_metacritic.pdfIn PDF document text
    • http://fajiragudabega.iblogger.org/pisukiwiji.pdfIn PDF document text
    • https://cdn.sqhk.co/zejizoguzut/ajepico/jejives.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366389/normal_5ff65a92383a5.pdfIn PDF document text
    • https://cdn.sqhk.co/dodirijobadi/8ihgj3p/bokeg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383807/normal_6024b4d051a2e.pdfIn PDF document text
    • https://cdn.sqhk.co/toxodimina/hd3hjVe/blockman_go_hack_gcube_no_human_verification.pdfIn PDF document text
    • https://cdn.sqhk.co/golemejexeno/gje3jeq/62040816791.pdfIn PDF document text
    • https://cdn.sqhk.co/giwitosak/bTjaQhc/radioactive_isotopes_have_stable_nuclei.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371497/normal_6007ecec86b41.pdfIn PDF document text
    • http://qwert-ita.fun/deroxisurufexodekiru0a6sp.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421224/normal_5fda776997045.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419205/normal_6016e751b5d8b.pdfIn PDF document text
    • http://ogranicbio.fun/65498276595gfsai.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393188/normal_5fe9885fa7a3c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422135/normal_5ff9ef579611a.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
    • http://lipunigofajeza.epizy.com/kakelo.pdfIn PDF document text
    • http://fipivolakiwupod.rf.gd/what_was_the_main_idea_of_enlightenment_philosophers.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_off0000e811.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE811 5312 bytes
SHA-256: 1a3fa4982d51e630a7d0733891068ba588cebe502f02c4cfda9602e888da91a6
font_01_sfnt_off0000fa03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA03 10016 bytes
SHA-256: ba82d4deacae4bc727479d3c78142c5d274e4378ff7fcd4d4aaa95b721424c74
font_02_sfnt_off00011c6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C6E 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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