Malicious PDF — malware analysis report

Static analysis result for SHA-256 36e1a94e89afb6ba…

MALICIOUS

PDF

113.9 KB Created: 2021-02-07 05:00:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: f8dc6e17a5cec90fdd80f1800030c934 SHA-1: a98f832c614a47303b1c8a8b0e78fe5f2b288859 SHA-256: 36e1a94e89afb6ba6cf0ecacca8e98a22b32167e69f1f784b1ff0afc7d68c138
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the presence of a malicious URL suggests the document's purpose is to lure the user to a compromised site, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • 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://yafferge.ru/123?utm_term=priest+guide+tera+2019 In PDF document text
    • https://ledimame.weebly.com/uploads/1/3/5/3/135306483/faloveriresej-mitazavogoleju.pdfIn PDF document text
    • http://lami-lashes.site/man_down_lyrics_lil_durk0d8at.pdfIn PDF document text
    • https://guxofoxevi.weebly.com/uploads/1/3/4/7/134737998/bopuzejilove_fonasujogumude_xuzubepisu.pdfIn PDF document text
    • https://nipapisowoxodo.weebly.com/uploads/1/3/5/3/135349464/visuzutama_firaroxegux_tomemibejag_rugekup.pdfIn PDF document text
    • http://tronreserve.online/band_apple_watch_setwypa.pdfIn PDF document text
    • http://microbladingcertificationdfw.org/top_ninja_movies_20183wwgp.pdfIn PDF document text
    • http://promoocaoameericanas.com/abecedario_chino_espaol4pruw.pdfIn PDF document text
    • http://doctora.club/keeper_password_manager_costff3i2.pdfIn PDF document text
    • http://theboldpantsproject.com/valibinasotaq235x.pdfIn PDF document text
    • http://outputqwvk.space/rixutetetazoxo97sk8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412396/normal_6015442a99795.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zuses/11623238085.pdfIn PDF document text
    • https://s3.amazonaws.com/pizexopenaxu/jonipowiraxubaxujimijux.pdfIn PDF document text
    • https://s3.amazonaws.com/jemisajoda/willy_weather_wind_report_cronulla.pdfIn PDF document text
    • https://s3.amazonaws.com/sezewu/11338301254.pdfIn PDF document text
    • https://s3.amazonaws.com/dotivaf/misenulowo.pdfIn PDF document text
    • https://s3.amazonaws.com/tutapaxi/simplifying_exponential_expressions_practice_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/tugabijenovili/49237286641.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_off00017487.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17487 2880 bytes
SHA-256: b90b109c34db9b2d961be312c0c64f13ba4f5af9c83d6ae4556a72cb7f468167
font_01_sfnt_off00017ec5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17EC5 5444 bytes
SHA-256: 6023118765266fc006512bd358257a9221454d509b481d811b61409a83af4407
font_02_sfnt_off00019151.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19151 11896 bytes
SHA-256: b81e9d2222a831193050c6bdcb20c9001332e72cf352e623da38d0e90a31d67b

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