Malicious PDF — malware analysis report

Static analysis result for SHA-256 720495d0f9dd2b57…

MALICIOUS

PDF

72.9 KB Created: 2021-03-15 21:59:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: fad5135a6d348b78bcde7721db8d7c40 SHA-1: ba8457ae838d85715b36526654eb17e532b310e5 SHA-256: 720495d0f9dd2b57223dc814ec75d788cec3d0661f85361cf4cedb06c7a868d4
156 Risk Score

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 0.9956

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 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://crophysi.ru/wix?keyword=ghostbusters+trophy+guide PDF link annotation
    • http://larumutul.getenjoyment.net/beowulf_with_lines.pdfIn PDF document text
    • https://lewumirobubav.weebly.com/uploads/1/3/4/7/134762292/4510737.pdfIn PDF document text
    • https://bopexetijajab.weebly.com/uploads/1/3/1/4/131411078/3160451.pdfIn PDF document text
    • https://suludexa.weebly.com/uploads/1/3/5/3/135314517/0e352ec8efa6a4.pdfIn PDF document text
    • https://kogekotosejikol.weebly.com/uploads/1/3/5/4/135400664/mofudamuduzipemozop.pdfIn PDF document text
    • https://gerasulas.weebly.com/uploads/1/3/4/8/134861388/3b674b60f030a.pdfIn PDF document text
    • http://konalofasu.mywebcommunity.org/wow_classic_can_shamans_use_swords.pdfIn PDF document text
    • http://punejew.mygamesonline.org/senejakuwafemulinerode.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://8eb0ff2f-1b5f-41fb-a82b-bf279dc7f43e.filesusr.com/ugd/868f76_a134cd9ffa1b48199b955a50436bfa98.pdf?index=trueIn PDF document text
    • https://e4034479-4ead-418b-af8c-5be8dc72bdbe.filesusr.com/ugd/1e8759_45ea848b86544b0a805c453b346b3fcf.pdf?index=trueIn PDF document text
    • https://f579be4a-c2ec-451d-94ee-532237c06880.filesusr.com/ugd/9f6a24_14ff82dc8a7444de82c245d0a1916a58.pdf?index=trueIn PDF document text
    • https://917ed8d3-8a9f-4c5c-a3ad-554e533308ad.filesusr.com/ugd/a4e402_74cf3448520b4ed7b5f7eae783d90772.pdf?index=trueIn PDF document text
    • https://61090d85-22e6-4724-b969-52a17785150c.filesusr.com/ugd/952c2e_be71b6e6240c461fab0b481abf2f6920.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/guxosa/bodyweight_exercises_to_lose_weight.pdfIn PDF document text
    • https://3e021c9a-284a-4c54-9ba1-f6d43d4d2ba5.filesusr.com/ugd/a619af_22c34f2436f24faa86ba7d0b62a8d157.pdf?index=trueIn PDF document text
    • http://jeximojela.myartsonline.com/whirlpool_washer_drains_but_does_not_spin.pdfIn PDF document text
    • https://c84d532c-3b33-47d6-96aa-4134a1164eb1.filesusr.com/ugd/6d45f6_0474a48aa29647a49d9cf6ac16bd67b3.pdf?index=trueIn PDF document text
    • https://952d9f4b-853a-4e85-af28-23c4d489d487.filesusr.com/ugd/8db125_1a3f15fbcc4c4ba8962a58bb22158d91.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xubifupi/argentina_vs_alemania_2006_formacion.pdfIn PDF document text
    • https://s3.amazonaws.com/davolazupivowi/aptitude_test_question_paper.pdfIn PDF document text
    • https://s3.amazonaws.com/jezaxojipevu/kavazolazas.pdfIn PDF document text
    • https://12350a4d-732a-4148-85a7-4fa27f2a77ec.filesusr.com/ugd/17beed_65e73a9685ab486899b534ee85fa5959.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kavalukato/ctet_exam_2019_answer_key_paper_2.pdfIn PDF document text
    • https://s3.amazonaws.com/lanorolowu/matricom_g-box_q2_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/kafises/adjetivos_posesivos_en_ingles_exercises.pdfIn PDF document text
    • https://s3.amazonaws.com/polojuliragam/29969497462.pdfIn PDF document text
    • http://safedoguno.onlinewebshop.net/fejizukojinobumag.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dee3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEE3 5252 bytes
SHA-256: acbdc365acbb5a9181ddeee3ba6ee07cebf333deed4ddddbe742c2c5642b693a
font_01_sfnt_off0000f0bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0BB 11032 bytes
SHA-256: 9f9e646164a389fee6ca2ad09e7deea51455f23ff7deb8c62c83885dd55d3ac5

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