Malicious PDF — malware analysis report

Static analysis result for SHA-256 eea8af90adc810fb…

MALICIOUS

PDF

76.7 KB Created: 2021-04-20 22:53:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: cac871b16ad285114bd67c891ea1df73 SHA-1: 5a7d203baed202f7079d2fe42af056f9f3822369 SHA-256: eea8af90adc810fbdf22d7ab37f188199d8c22af1558b3960ea55a69fd9803e8
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 0.9997

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://soxebez.ru/strik?utm_term=what+is+the+order+of+the+magic+tree+house+books PDF link annotation
    • https://pimalikatirowo.weebly.com/uploads/1/3/4/0/134040386/vased-disutubiba-borifupumofefol.pdfIn PDF document text
    • https://tusuwijajibu.weebly.com/uploads/1/3/4/5/134517525/fuwifimeralokuxawe.pdfIn PDF document text
    • https://wofinomedek.weebly.com/uploads/1/3/4/1/134108675/rokedixifer.pdfIn PDF document text
    • https://tabetigilazewa.weebly.com/uploads/1/3/5/3/135392987/c1eed1addc82e.pdfIn PDF document text
    • https://pesasujax.weebly.com/uploads/1/3/4/8/134882000/233845.pdfIn PDF document text
    • https://cdn.sqhk.co/rarukaboz/bifHicV/recette_sandwich_jambon_fromage_crudite.pdfIn PDF document text
    • https://cdn.sqhk.co/nokowifupe/jibhf4M/sanirojila.pdfIn PDF document text
    • https://napajudiweji.weebly.com/uploads/1/3/4/3/134316113/repunagodafifuzagixa.pdfIn PDF document text
    • https://sefedajexoxoj.weebly.com/uploads/1/3/4/4/134479396/7de4c1d646a15e.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/fomudebipefasu/povivafanuto.pdfIn PDF document text
    • https://s3.amazonaws.com/xipavir/87798364945.pdfIn PDF document text
    • https://s3.amazonaws.com/megujobemegor/65594682610.pdfIn PDF document text
    • https://s3.amazonaws.com/waxegatulo/freelancer_game_mods.pdfIn PDF document text
    • https://s3.amazonaws.com/litunux/venunekuvotemez.pdfIn PDF document text
    • https://s3.amazonaws.com/tujeviwakirawu/33408605755.pdfIn PDF document text
    • https://d2faa26e-66ca-44cd-8f84-883624a71019.filesusr.com/ugd/dbbfd0_72f72a2fc7d64e66b6952b4eb10b5533.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/degagaziv/absolver_downfall_trophy_guide.pdfIn PDF document text
    • https://e22e8d81-f41f-4d51-abb1-39b19d2d32bb.filesusr.com/ugd/96bf9d_b79daa0520c248838d98d4cf016f3a0b.pdf?index=trueIn PDF document text
    • https://ec08fec6-e576-400d-8504-372613838d3c.filesusr.com/ugd/57e0ce_bd367140aaf747768cd3ffaf4f94b25b.pdf?index=trueIn PDF document text
    • https://926da24b-d3df-4aea-ac1b-ebdf7359a9e7.filesusr.com/ugd/fef925_5b400a6da4ac4a1da5b69f33943a73b3.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tosego/22682246477.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_off0000ef9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF9E 5620 bytes
SHA-256: 278c20bce72a3e6a851c6c53005d7e0172d33dc648a95ea410f908cb7e3d0718
font_01_sfnt_off0001029e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1029E 10212 bytes
SHA-256: 5518bc5b16577c47fc9d6a98f0502066fd18f15b402ed45ae25ef0783c3ddeae

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