Malicious PDF — malware analysis report

Static analysis result for SHA-256 a46afeff8dcd67b2…

MALICIOUS

PDF

88.8 KB Created: 2021-04-07 00:23:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a19eef83821fb674738016e2ef323ad5 SHA-1: 96d4393563cd3a918b8066bfa6bf64ea772a7745 SHA-256: a46afeff8dcd67b2ebd355beb6afb4a41de33ac0bd0974bad1193861decf6164
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many pointing to benign content, but one critical link to 'jumiwimov.ru' is identified as malicious. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution. The document body, though heavily obfuscated, appears to be a lure related to Garmin GPS setup, directing users to the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • 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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://jumiwimov.ru/strik?utm_term=garmin+n%25C3%25BCvi+2597+gps+einschalten
    • https://cdn-cms.f-static.net/uploads/4406213/normal_5fe8db0fb7e4c.pdf
    • https://static.s123-cdn-static.com/uploads/4405895/normal_5ffb6c6ad484e.pdf
    • https://naruvemekojesez.weebly.com/uploads/1/3/4/6/134685524/nosaxefitenef-vusilak.pdf
    • http://zesegalos.scienceontheweb.net/51080324004.pdf
    • https://cdn-cms.f-static.net/uploads/4457854/normal_604783d8ba69b.pdf
    • https://cdn-cms.f-static.net/uploads/4445333/normal_606a41d2db057.pdf
    • http://tixaman.scienceontheweb.net/divine_mercy_shrine_cdo_mass_schedule.pdf
    • https://cdn-cms.f-static.net/uploads/4444866/normal_600ddf13d66ac.pdf
    • https://gipoxafevipetim.weebly.com/uploads/1/3/1/3/131398102/sagitimafiniwimu.pdf
    • https://mokapojigum.weebly.com/uploads/1/3/4/6/134690111/3c240205.pdf
    • https://cdn-cms.f-static.net/uploads/4388065/normal_60127757d9745.pdf
    • https://xiruzukigipimog.weebly.com/uploads/1/3/4/8/134865515/4f881df42c8.pdf
    • https://cdn-cms.f-static.net/uploads/4371495/normal_606b11bd694d0.pdf
    • http://zexaribamemavi.sportsontheweb.net/kizuvu.pdf
    • http://xoxuvajes.mywebcommunity.org/how_to_report_two-way_anova_results_in_a_table.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/zevutebulaworel/vampire_diaries_damon_and_elena.pdf
    • https://s3.amazonaws.com/figidireki/kalagofugumusinibuserum.pdf
    • https://s3.amazonaws.com/bupijila/pijowosunevu.pdf
    • https://s3.amazonaws.com/xirixepo/princess_diaries_2_full_movie_with_english_subtitles_download.pdf
    • https://s3.amazonaws.com/woneketelak/65075526057.pdf
    • https://s3.amazonaws.com/megodipewukitoj/tres_tipos_de_ecuaciones_exponenciales.pdf
    • https://s3.amazonaws.com/sizabo/95392935508.pdf
    • https://s3.amazonaws.com/tajimipojimo/15721166435.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010d0d.bin
f06c39f21777f6a267d7a819b2846138a58c30129970c6b89a0bb4bbbb5cc61f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10D0D 5728 bytes
font_01_sfnt_off00012076.bin
d9457c0cb3afdbadd8a23e648c1c2e6a7d490d744e0c5f6adacb38fbb1b25378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12076 10988 bytes
font_02_sfnt_off000145da.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x145DA 4324 bytes

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