Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1ce620143a889b4…

MALICIOUS

PDF

74.5 KB Created: 2021-03-23 07:01:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 9d7dbfbbb3e1456802549586c8da0b0e SHA-1: 375b9585e423d318a7129e2b7e30fc77a3df8b61 SHA-256: f1ce620143a889b488fc73e64b131261af1cf160342c006096645737b1f3f733
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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 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.
  • 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://mezovuduw.ru/award?keyword=subject+verb+agreement+collective+nouns+worksheet+with+answers+pdf PDF link annotation
    • http://opsnatur.fun/vevolokufemedenufosikuwuq6wx8.pdfIn PDF document text
    • http://creditchecktotal.info/ccds_full_form_in_pharmacovigilancekqp7a.pdfIn PDF document text
    • http://thedopemarketing.com/28583957784gukgt.pdfIn PDF document text
    • http://submonster.xyz/fulvenes_aromaticityw5idg.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://b67fa923-03b4-4d21-b555-95ff628d7525.filesusr.com/ugd/1d4b90_0bc583affa044f26a8ee535814c75097.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/445d896d-64c6-493c-92c8-e116ca3a6b91/how_to_convert_non_believers_to_christianity.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eff6353f-a369-42ff-b6ba-046bf58a82f9/rival_shaved_ice_maker_instructions.pdfIn PDF document text
    • https://s3.amazonaws.com/gurupixabogivaz/55529738112.pdfIn PDF document text
    • https://s3.amazonaws.com/rogugagatuf/learning_english_discussion_questions.pdfIn PDF document text
    • https://45f61934-b4a1-4335-a9e3-e142d9465b5b.filesusr.com/ugd/0dd040_1e4726772b094b7a8f2286e4d0f25324.pdf?index=trueIn PDF document text
    • https://c9254e9e-0e71-498a-8384-ab4c929b52b4.filesusr.com/ugd/0699ff_798fdc2bad014395a54a6380e6bc727e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tubukeganuji/vehicle_dynamics.pdfIn PDF document text
    • https://s3.amazonaws.com/gavexilatuvitaz/38576323034.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/86bc0f2e-f1aa-4c68-818f-9d2a920df6f5/this_sex_which_is_not_one_summary.pdfIn PDF document text
    • https://s3.amazonaws.com/zuniverijesud/gebazivotiwedavelo.pdfIn PDF document text
    • https://7fc1e5b2-1dd8-4457-9de2-3dea1ab9f589.filesusr.com/ugd/fedd61_3bbaa734e24f40d59b56191dc8959318.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/4265831b-c50a-4fa3-9c11-5e113769af84/60849760951.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94f903ea-e033-42f9-91bc-bff1f38fde79/14909449241.pdfIn PDF document text
    • https://s3.amazonaws.com/dinisemowoge/69175597496.pdfIn PDF document text
    • https://959e49da-b405-4961-97d4-5c1bb2e9a628.filesusr.com/ugd/ab0441_0a3153d4471c4573b64d9ac30968b696.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b02edc3-daf4-4583-b48e-5fcb7d048af7/45752119036.pdfIn PDF document text
    • https://s3.amazonaws.com/vefagotoje/harmans_cabins_fishing_report.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e1b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1B8 6104 bytes
SHA-256: 2a521a152948a7985c0ec0704489309fd7da64bbfadcc1d1acef610acdcd8306
font_01_sfnt_off0000f66d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF66D 11116 bytes
SHA-256: e7afe5aa9bcbcad217f80d8124fa177dcaf3d58f61c7f25128f3fda663500e97

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