Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3b6706ac2d2c887…

MALICIOUS

PDF

83.2 KB Created: 2021-03-13 23:22:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 5d859699ec124563476fbe8a8aebce2c SHA-1: 15ac0d9d42ad3c90a561b06ae4b4c031f1523e64 SHA-256: c3b6706ac2d2c887562bf95db20af6f70a43ee2154599cfe2a0e0a877d384743
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 0.9995

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://nipisod.ru/123?utm_term=sales+analysis+report+meaning PDF link annotation
    • https://cdn.sqhk.co/nowavutu/ibgdgje/dokikawowexijozofiluvi.pdfIn PDF document text
    • https://cdn.sqhk.co/benibavagoge/hhNSVhc/6557229969.pdfIn PDF document text
    • https://cdn.sqhk.co/laloropaki/jjjhapA/the_last_ninja_origin_top_up.pdfIn PDF document text
    • https://cdn.sqhk.co/libavesonon/2u0dggz/uc_browser_mini_apk_download_for_jio_phone.pdfIn PDF document text
    • http://zarozunaxa.iblogger.org/channels_tv_apk.pdfIn PDF document text
    • https://zujamabosav.weebly.com/uploads/1/3/4/3/134363941/mevaxem-vobixaw-bevezuwibovepa.pdfIn PDF document text
    • https://jobadenel.weebly.com/uploads/1/3/1/1/131164033/bonilitatazaburud.pdfIn PDF document text
    • https://vaturelola.weebly.com/uploads/1/3/4/7/134704713/1a090.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jedugapi.epizy.com/suwubinozoxaze.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwuzerijofa/rojenexexidikiluko.pdfIn PDF document text
    • https://s3.amazonaws.com/xakajoziwibi/what_is_cutover_migration_in_office_365.pdfIn PDF document text
    • https://s3.amazonaws.com/bibejovixapis/wevesumesaxam.pdfIn PDF document text
    • https://s3.amazonaws.com/sikuva/java_for_linux_7.pdfIn PDF document text
    • https://2a4b29e6-a790-453e-81e7-e8b9caf2c27b.filesusr.com/ugd/bf0735_99a4d6cade71470ab227c8d3c3f75fdd.pdf?index=trueIn PDF document text
    • http://xugomoxuniwemo.rf.gd/53260427307.pdfIn PDF document text
    • http://lipesomidu.epizy.com/37281120989.pdfIn PDF document text
    • https://89f68ddc-9f98-4e60-8afa-3e0ca6603e9e.filesusr.com/ugd/4725f1_8d9919f5884a42438d6145795354d671.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fajeloninesitel/how_to_tell_if_you_have_cystic_acne.pdfIn PDF document text
    • http://dijovomivuz.rf.gd/augmented_reality_in_marketing.pdfIn PDF document text
    • https://s3.amazonaws.com/nasitevu/90592468067.pdfIn PDF document text
    • https://945b3f91-9c76-4178-be32-f0dab3cfe2c6.filesusr.com/ugd/8d5d69_891e7dda74ce4ff4935c10f27337299c.pdf?index=trueIn PDF document text
    • https://973697ad-ffa4-4f9d-85cd-0c9d1ea039ee.filesusr.com/ugd/5f5755_f5799aed775b4211b4dd9a0e96c2ee5b.pdf?index=trueIn 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_off00010788.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10788 5344 bytes
SHA-256: b419b6b693ff54871f7ab6a4eb3a88fb1a0de39273bd963d66e1faf11a1d5082
font_01_sfnt_off000119a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119A5 11132 bytes
SHA-256: 11291c36c20c23b811e18a2f287d336071a62eaa1b00106786c9bf9a0d36f2e1

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