Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8313a522dc0ecdf…

MALICIOUS

PDF

78.8 KB Created: 2021-03-07 11:43:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d25cb590190120519d8eca2a410fa4f7 SHA-1: f77030f71618f7da7d805f5e8d52113f8bde9739 SHA-256: b8313a522dc0ecdf8f07735b0723bb6ca5f10ca9d21af51eefc7f0c2ffa9127a
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL pointing to a suspicious domain. ClamAV and ML classifiers flagged this PDF as malicious, specifically as a phishing trojan. The document body, though heavily obfuscated, appears to reference a watch manual, suggesting a lure to trick users into visiting the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 4

  • 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://soxebez.ru/strik?utm_term=casio+g-shock+ga-100-1a1er+manual
    • http://gajonedorebuko.mywebcommunity.org/engineering_drawing_tools_price_in_sri_lanka.pdf
    • http://maxidaxuwifu.22web.org/what_are_the_3_economic_questions_all_society_face.pdf
    • https://cdn.sqhk.co/dogutadova/WAkpHja/luwororixadewu.pdf
    • http://vannabanyavsedela.xyz/vejowalezarosinekuzisenofhpjc.pdf
    • http://vvvvvvvvvvvvvvvvvvvvvb.xyz/ln_nin_zellikleri5n9y2.pdf
    • https://cdn.sqhk.co/kekelivig/9jizxhe/cheats_for_charm_king_game.pdf
    • https://cdn.sqhk.co/menigopas/jfmHgco/7428811631.pdf
    • http://gerujab.22web.org/43716765534.pdf
    • http://scoretdho.best/729969630387b60n.pdf
    • http://bewizasosu.sportsontheweb.net/rogedizerukuzujusux.pdf
    • http://ottics.ru/powerful_phrases_for_effective_customer_serviceay6w3.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/defipedibe/ashes_cricket_game_2017_apk.pdf
    • https://s3.amazonaws.com/gorajikunobixi/hikvision_cctv_installation_guide.pdf
    • http://wulibazosuxib.onlinewebshop.net/80013397475.pdf
    • https://s3.amazonaws.com/matogapibelifiv/cephalosporins_2018.pdf
    • https://s3.amazonaws.com/zowibatev/4180676613.pdf
    • http://gafodix.myartsonline.com/what_is_the_news_of_covid-19.pdf
    • https://s3.amazonaws.com/tomamujuf/63547332183.pdf
    • https://s3.amazonaws.com/jopomodilamego/screen_dimming_app_android.pdf
    • http://rabopusafat.epizy.com/nepinafumobi.pdf
    • http://lebozid.epizy.com/29348622819.pdf
    • https://s3.amazonaws.com/bexolamabad/income_tax_return_acknowledgement_2016-_17.pdf
    • http://zujexig.epizy.com/lodor.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f7f4.bin
a061ead1cc969fa87eec1d4fa5d50ad0782d45f85774bb158c0d57d8d91dbae9
pdf-font-stream PDF embedded font (sfnt) at offset 0xF7F4 5408 bytes
font_01_sfnt_off00010a35.bin
c81771927cc49fec5d708a40dc71049d5b3962b7c4aa25131a6860985d5fec48
pdf-font-stream PDF embedded font (sfnt) at offset 0x10A35 10396 bytes