Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae6c54f333b6af2d…

MALICIOUS

PDF

92.1 KB Created: 2021-03-22 19:37:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 419f3b4ded4d165ee32cb6dbc8a5a0a7 SHA-1: 5b8d2a423740301fa4527e7a8c69a3d852cb73f6 SHA-256: ae6c54f333b6af2db1dc519db4cfd54351a817ca555e53d76b828c383c541538
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 0.9994

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://baarspo.ru/award?keyword=circular+motion+class+11+notes+pdf PDF link annotation
    • https://lebuwaner.weebly.com/uploads/1/3/4/4/134478239/gobesixuboj-fodesob.pdfIn PDF document text
    • http://senteber.site/3384135205fy7qt.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393751/normal_6035ab819ee7f.pdfIn PDF document text
    • http://hidver.com/24267059301lc5fo.pdfIn PDF document text
    • https://vunisanege.weebly.com/uploads/1/3/0/8/130813420/4278025.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464529/normal_60512d7287a19.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380863/normal_605531492e7dc.pdfIn PDF document text
    • https://fukukajapojuj.weebly.com/uploads/1/3/2/8/132815924/d91bff1f5.pdfIn PDF document text
    • http://greyfruit.space/milemosituteteseteb8x3rp.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://459fb65c-52af-4c88-885a-43a44fbeaf25.filesusr.com/ugd/6a7407_fe19e46be6694871a9b5958932ee3531.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/muvemasoxaji/asche_abar_shabor_full_movie_hd.pdfIn PDF document text
    • https://s3.amazonaws.com/jozaponi/aventador_vs_huracan_performante.pdfIn PDF document text
    • https://s3.amazonaws.com/xukirizugukugi/rs3_beastmaster_durzag_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/wutisigila/22775133447.pdfIn PDF document text
    • https://f38be386-5799-403b-9303-fb121113655a.filesusr.com/ugd/6f1aa7_04339be5f0e64faba75bbf6b825fb9f5.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/satedafadusizo/evermotion_archinteriors_vol_47.pdfIn PDF document text
    • https://s3.amazonaws.com/sojuravewi/exercices_orthographe_college.pdfIn PDF document text
    • https://37bdae34-bb2f-403f-997c-54a7c09d9c06.filesusr.com/ugd/dc98cc_b2eaece32e614e819baf9d53f0b0fe40.pdf?index=trueIn PDF document text
    • https://7b806e58-2e0f-4c22-b5e1-e0f71c4d6e86.filesusr.com/ugd/8da65f_8ad0a4494e3b41c0b96c5d6d8a92047f.pdf?index=trueIn PDF document text
    • https://cf62593c-3f62-494e-9ef9-3c2a63ead7d7.filesusr.com/ugd/93dae2_1b106f48a5804154ae02d88bff495747.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/miledu/zawotuvapiwane.pdfIn PDF document text
    • https://s3.amazonaws.com/najubu/alien_shooter_td_for_pc.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011373.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11373 5256 bytes
SHA-256: 028cc727858d7f9f39035a6d64090e9a840a36d84e4c09e1507ed05ce86a09de
font_01_sfnt_off0001253f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1253F 11788 bytes
SHA-256: 2f7d8afe8cfc95a465c787ea18c70505580d3e57ead9144872fd9ae84faab449
font_02_sfnt_off00014d96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14D96 16088 bytes
SHA-256: ccf42771811f3bfcfc4881e0ea26c61020463520b77f542a172ed5d532e4d210

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