Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5af1278c7a5d868…

MALICIOUS

PDF

70.1 KB Created: 2021-02-26 02:29:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: dbb6b4a13ad8c988a7015613ab1b28fb SHA-1: a3fafdb823a9861c13da59fb1b781f8927d581e0 SHA-256: d5af1278c7a5d86836c77e00c06dd8c64e08c9c470b9f78b39549f11ad2211a1
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 0.9998

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://leonvi.ru/wix?keyword=seven+perfect+angels+lia+instagram PDF link annotation
    • http://peromopativej.mypressonline.com/descripcion_psicologica_de_los_personajes_cronica_de_una_muerte_anunciada.pdfIn PDF document text
    • https://xesanojazal.weebly.com/uploads/1/3/0/9/130968931/9333933.pdfIn PDF document text
    • https://zotekuruwufuk.weebly.com/uploads/1/3/4/1/134108654/gokewajotu.pdfIn PDF document text
    • http://wumewil.sportsontheweb.net/fatutisibikejigub.pdfIn PDF document text
    • http://warixedivukinat.mygamesonline.org/ge_6_device_universal_remote_codes_cl4.pdfIn PDF document text
    • https://dojifidixiwaji.weebly.com/uploads/1/3/4/3/134372722/8966816.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://s3.amazonaws.com/tubukeganuji/juzotikitolovaz.pdfIn PDF document text
    • http://limepupotof.epizy.com/tibagavewiwuj.pdfIn PDF document text
    • https://s3.amazonaws.com/penale/vimalabiruwoturitoro.pdfIn PDF document text
    • https://s3.amazonaws.com/vasofirida/equipment_world_spec_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/gifojuxaxeva/accumulator_register.pdfIn PDF document text
    • https://s3.amazonaws.com/kaxukok/lovuxujofufegeb.pdfIn PDF document text
    • https://s3.amazonaws.com/gotitibekovi/apache_camel_source.pdfIn PDF document text
    • https://s3.amazonaws.com/libusamagowuvo/21898028206.pdfIn PDF document text
    • https://s3.amazonaws.com/fedufiporara/sesabarunuzotokofanejivex.pdfIn PDF document text
    • https://s3.amazonaws.com/tokudapele/campos_eliseos_mitologia.pdfIn PDF document text
    • https://s3.amazonaws.com/ruzumeb/79315105390.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c830.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC830 5176 bytes
SHA-256: d5fa5d33cfa112d4b93c6686134a751aa6c540c1199ac01ef2d563569795f486
font_01_sfnt_off0000d9ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9AE 10396 bytes
SHA-256: f67bf99cb7bbbf1ebe4af75ea9d595e1eec0c6e2aa59b1f3a7598c74423173e6
font_02_sfnt_off0000fd24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD24 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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