Malicious PDF — malware analysis report

Static analysis result for SHA-256 666849a7c940e51a…

MALICIOUS

PDF

75.7 KB Created: 2021-03-26 16:42:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 36252cecac2106683d84327187773780 SHA-1: 968e35555ddc2e55d1ecb6d5368a7eba90c2cd6a SHA-256: 666849a7c940e51a2cfaa5ed1e91d0001b9f2a37c1564796be79378cd70dc386
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 0.9997

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://dafemum.ru/award?keyword=starter+kit+for+arduino+pdf PDF link annotation
    • http://kizijele.iblogger.org/73999296836.pdfIn PDF document text
    • http://thiswaytovogue.com/tv_box_h96_max_android_9._0u7t0n.pdfIn PDF document text
    • https://cdn.sqhk.co/sinewuvemomi/p0hdZxf/20030594706.pdfIn PDF document text
    • http://lessonsonline.site/xenisikinqdvw.pdfIn PDF document text
    • http://vemifamikoni.iblogger.org/rorefi.pdfIn PDF document text
    • https://cdn.sqhk.co/texonatuzi/cEjHNMq/clay_pot_decoration_ideas.pdfIn PDF document text
    • http://wiwurike.iblogger.org/xexetagesukofuvozo.pdfIn PDF document text
    • http://helplnstagramoffice.com/surfboard_sb6141_hard_resetikug7.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/gelawiweza/formel_1_sky_2018.pdfIn PDF document text
    • http://koxaxegeselaxo.rf.gd/sijigexefizusor.pdfIn PDF document text
    • https://eecb1da5-82b7-48ef-90e5-6a20895c07e7.filesusr.com/ugd/88a84f_5f10dcb148f047e5affb97540f879a44.pdf?index=trueIn PDF document text
    • http://sasejas.epizy.com/birevewem.pdfIn PDF document text
    • https://s3.amazonaws.com/tezofuretejom/what_is_the_best_undercounter_refrigerator.pdfIn PDF document text
    • https://3857ddc0-2b33-46ba-b4a8-ebef9b167687.filesusr.com/ugd/5cc0d5_7c0b2879a41a4431b518704ae41628d0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pujirageg/my_bloody_valentine_2009_movie_free.pdfIn PDF document text
    • https://s3.amazonaws.com/mujevubutukoxu/gapps_4._3._1_cm_10._2.pdfIn PDF document text
    • https://s3.amazonaws.com/tinezedu/kivufukuj.pdfIn PDF document text
    • https://s3.amazonaws.com/rokuwapesu/8189181984.pdfIn PDF document text
    • https://s3.amazonaws.com/mesixadelomomo/pajuvakolelipe.pdfIn PDF document text
    • https://s3.amazonaws.com/xunilukegez/xupuvesewutunesaxozik.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_off0000eb68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB68 4992 bytes
SHA-256: c3c05f8744a32edfd4c679bbfe991f2aa395d13ae89cde3260100187d19ed57a
font_01_sfnt_off0000fc7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC7A 10984 bytes
SHA-256: 0f3fef76248d18e2ddf0417dda18d399120deca8907fca4b2d73ad96be12e937

Open this report in the interactive analyzer, or submit your own file for analysis.