Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f83892aa76eff6c…

MALICIOUS

PDF

77.2 KB Created: 2021-03-19 14:08:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 4bb6860ab2fd7a3e7f9a5794e6388b79 SHA-1: 10df239998e0dd537b6f7b95a18e5a1a66fbbd6f SHA-256: 8f83892aa76eff6c0d86c63073782b9ff68d4b28a3e5a321178d3ad903ac1ad7
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 0.9993

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://zajinet.ru/wix?keyword=easter+egg+clip+art+border PDF link annotation
    • https://cdn.sqhk.co/ravuviwidi/idjbJjf/rerizomonajap.pdfIn PDF document text
    • https://cdn.sqhk.co/xazururoxe/6vmeSao/guzuvuk.pdfIn PDF document text
    • https://cdn.sqhk.co/tabewinudeka/tjeX1gc/kids_nursery_rhymes_songs.pdfIn PDF document text
    • https://giximelet.weebly.com/uploads/1/3/4/2/134234701/9574503.pdfIn PDF document text
    • https://cdn.sqhk.co/nopavoboriru/7qjejd1/63963511493.pdfIn PDF document text
    • https://kinanufojakosek.weebly.com/uploads/1/3/4/3/134350472/5173666.pdfIn PDF document text
    • https://cdn.sqhk.co/fufejapopunu/Rhfhaif/67199112883.pdfIn PDF document text
    • https://cdn.sqhk.co/vuzowadijavu/eggiePv/mcat_scores_for_medical_schools_canada.pdfIn PDF document text
    • https://cdn.sqhk.co/zajujinul/VgjFr69/neruvulidosuzopanopemesis.pdfIn PDF document text
    • https://jupavovol.weebly.com/uploads/1/3/4/3/134314217/tamerigutitixuluguw.pdfIn PDF document text
    • https://cdn.sqhk.co/tumosirewuw/gipij2l/28377174916.pdfIn PDF document text
    • https://cdn.sqhk.co/manigonodapu/Bjb47VR/ayo_teo_rolex_mp4_video.pdfIn PDF document text
    • https://cdn.sqhk.co/dagozuwemep/siavjby/85799537611.pdfIn PDF document text
    • https://cdn.sqhk.co/joxusozomilo/gchiThi/car_action_games_racing_2020_online_play.pdfIn PDF document text
    • https://cdn.sqhk.co/gobefuvumi/cdgdPhd/nasacort_generic_walgreens.pdfIn PDF document text
    • https://xurugafidas.weebly.com/uploads/1/3/6/0/136081795/zopuxiraxumapom.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/sukobogixe/bling_launcher_live_wallpapers_and_themes_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/leteraxewe/berajis.pdfIn PDF document text
    • https://s3.amazonaws.com/sazariwapa/baby_girl_christmas_dress_target.pdfIn PDF document text
    • https://s3.amazonaws.com/kawotexulozax/lifulenagidesaj.pdfIn PDF document text
    • https://s3.amazonaws.com/zetituri/academic_vocabulary_toolkit_1.pdfIn PDF document text
    • https://s3.amazonaws.com/kawotexulozax/verona_ontario_weather_report.pdfIn PDF document text
    • https://s3.amazonaws.com/mefonevimimix/apache_ant_for_linux_free.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF99 5336 bytes
SHA-256: 20ac77329faa2001fb33cc4cf3a5b4cc2f90b9e97f1c352d8c8bd917c9f706ad
font_01_sfnt_off000101c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101C8 11024 bytes
SHA-256: 466a92c3ba01a4b36119702ecb060c0768219b2a393b7e5d5f57d1ee8dddf2f8

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