Malicious PDF — malware analysis report

Static analysis result for SHA-256 e39a8c341d977d6b…

MALICIOUS

PDF

76.3 KB Created: 2021-04-02 06:20:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 82642d04b13242a5e803216ad5971e5a SHA-1: 865a5d82719b4fcce17c88600eac378bfe62000f SHA-256: e39a8c341d977d6b1f16739421f79af8ac43218d051e860b5a0373dd848c46d8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file contains numerous external links, many of which are part of a link farm designed to direct users to malicious websites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. The embedded URLs suggest an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/award?keyword=andreas+moritz+buch+pdf
    • http://nakekizedexu.getenjoyment.net/17022840783.pdf
    • https://revafabeku.weebly.com/uploads/1/3/4/7/134708131/zajanutip_kofuv_fawefepefoxu_xokerasawuz.pdf
    • https://cdn.sqhk.co/wifavizen/Ajdhhjc/play_talking_ben_dog_online_free.pdf
    • https://cdn.sqhk.co/gobajejuz/ij8jjgf/dodaxebepukotavugexosavaj.pdf
    • https://parafobosa.weebly.com/uploads/1/3/1/8/131857791/f6a9ac7bb.pdf
    • https://nagudunegotup.weebly.com/uploads/1/3/2/6/132681409/fuzizizi.pdf
    • https://cdn.sqhk.co/xadakede/gaPDlUo/upcoming_fighting_games_2019.pdf
    • https://jipenudus.weebly.com/uploads/1/3/1/4/131406532/5a5df6cf6.pdf
    • https://jamofavoxaf.weebly.com/uploads/1/3/4/6/134698870/8018534.pdf
    • https://vopusufibos.weebly.com/uploads/1/3/4/7/134731751/kesiladomapuro_pevusa.pdf
    • https://popibixa.weebly.com/uploads/1/3/4/7/134745137/583550a.pdf
    • https://semetipakes.weebly.com/uploads/1/3/0/7/130775831/winonuradojoxuvij.pdf
    • https://sudodufutela.weebly.com/uploads/1/3/5/9/135960501/gipexit.pdf
    • http://pemotutafid.mywebcommunity.org/bribery_in_business.pdf
    • https://serataxufo.weebly.com/uploads/1/3/1/6/131606193/xizugavapibejutoxol.pdf
    • http://xijipeva.mypressonline.com/76419382909.pdf
    • https://cdn.sqhk.co/xibidodoko/ijghVgi/tour_de_france_cheat_motor.pdf
    • https://xekafifem.weebly.com/uploads/1/3/4/6/134669887/4933406.pdf
    • https://porovepo.weebly.com/uploads/1/3/4/5/134527374/temafamikaw_jotufuminiku.pdf
    • https://numetoximo.weebly.com/uploads/1/3/4/7/134717633/dasumaluf.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/jidagafinuxesu/clery_reportable_crimes_list.pdf
    • https://s3.amazonaws.com/zepifudoxapo/smartsheet_software_reviews.pdf
    • https://s3.amazonaws.com/rurosaveruk/32885430949.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee13.bin
8389499bfa8309c1555ee688c18488339b3b4bb360916bab94c9cff0d14baaf0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEE13 5540 bytes
font_01_sfnt_off000100c3.bin
cc1564368d184c19b1a0f7a14de7b30906c3aa2479bd8e2227b5f9ac7c8ce3e2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x100C3 11744 bytes

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