Malicious PDF — malware analysis report

Static analysis result for SHA-256 66b43a6e4a783559…

MALICIOUS

PDF

95.7 KB Created: 2021-03-16 17:52:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: d4d33c24cb1e9fbc5f5fd90af15b894a SHA-1: 1734a17db1c07717fa68acf1292ea48f9970618b SHA-256: 66b43a6e4a783559167e108a4f919bfc19e8b748d90dfe58e5369d9b22d2ba4f
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-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://xezojetit.ru/wix?keyword=nucleic+acids+function+biomolecules PDF link annotation
    • https://cdn.sqhk.co/novimabe/9Gzihif/amazed_meaning_in_bengali.pdfIn PDF document text
    • https://cdn.sqhk.co/lajefage/Ni6rYig/46034385526.pdfIn PDF document text
    • https://cdn.sqhk.co/fifenije/Ejjfgii/3724744495.pdfIn PDF document text
    • https://cdn.sqhk.co/bulelovuroga/i2a4Spa/57977979302.pdfIn PDF document text
    • https://cdn.sqhk.co/ragonujip/c14hclf/arrow_films_warehouse_sale.pdfIn PDF document text
    • https://cdn.sqhk.co/pomiwuximu/jcFKjcI/66543504550.pdfIn PDF document text
    • https://cdn.sqhk.co/bokirebi/ib2ZQhi/montable_dino_racer_power_wheels_jurassic_world.pdfIn PDF document text
    • https://cdn.sqhk.co/kewawukufiju/cZ8KIDk/kosenilivor.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/45bcfa48-29c3-4a7f-91bb-47cada31488a/51284076856.pdfIn PDF document text
    • https://s3.amazonaws.com/gotijejaj/alphabet_worksheets_for_lkg.pdfIn PDF document text
    • https://3176e400-c268-4dc0-8d69-08eae86937f8.filesusr.com/ugd/ea2f88_012adfefd05c4b4b81431871e084ad5e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rejiner/politica_nacional_do_meio_ambiente_resumo.pdfIn PDF document text
    • https://s3.amazonaws.com/tezude/ximitujumadowolajoja.pdfIn PDF document text
    • https://be08d7d4-326a-4801-be9d-4496af17a43b.filesusr.com/ugd/d31907_4ed2c323cb9a4b268d1dcf6088bf57d8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wuzalugiseto/allu_arjun_photos_ing_coming.pdfIn PDF document text
    • https://s3.amazonaws.com/sulasatevirexo/weteninoronezasugitewi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/849e6786-b08a-4ee0-90ba-e9c5093c74f5/learn_korean_in_30_days_book.pdfIn PDF document text
    • https://s3.amazonaws.com/rikolesafuwofar/glow_worm_ultracom_18hxi_user_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/zarelusipofox/amd_radeon_vega_8_treiber.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000114ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114EC 5060 bytes
SHA-256: 3bfc099f0c74ce287db86510ba40922893cce9f81c387e74d2dc89b6524291ec
font_01_sfnt_off0001260b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1260B 11600 bytes
SHA-256: 573c0591d7a31c9fbf65b3ab64e1ec3a3d43b906ad8691e61b5e830530eca8e9
font_02_sfnt_off00014cda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14CDA 16060 bytes
SHA-256: 5b0d2701ab39d2f69c66d7d16c60d8db0b323aa0832947137e757b5401d27330
font_03_sfnt_off00016172.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16172 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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