Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb4a3b658d686f7d…

MALICIOUS

PDF

68.3 KB Created: 2021-04-04 03:00:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8b121afd5ee7a9d53dc2d62ee0aecfd1 SHA-1: 9353f2e50f3bc1c9d9f9ddd67f50ba95d557df34 SHA-256: bb4a3b658d686f7d60bf35841526cf0806442060d8e27ae8395ac9464800cabc
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, and numerous other URLs were extracted, many of which are associated with phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect the user to a phishing site for credential harvesting or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://midufefew.ru/award?keyword=water+supply+and+sanitary+engineering+s+c+rangwala+pdf
    • http://lokotahas.ru/6220894572mf9i1.pdf
    • http://changepass.online/ukulele_strumming_patterns_4_4d4fg6.pdf
    • https://cdn.sqhk.co/fofesali/00gjhf1/36088813903.pdf
    • http://onlinekartiadesi.com/14407281975wk3cu.pdf
    • https://cdn.sqhk.co/givujelised/igiZehh/free_streaming_movies_sites.pdf
    • https://static.s123-cdn-static.com/uploads/4454995/normal_5fe1cf42642b8.pdf
    • https://cdn.sqhk.co/tawavumazo/ujvjcje/taptap_send_ceo.pdf
    • https://cdn.sqhk.co/revujinarewu/cuGagfP/japapopovij.pdf
    • http://free-at.pro/romefabivobadevedapqh4xe.pdf
    • https://cdn.sqhk.co/fajoliteve/giihgUl/hoops_basketball_arcade.pdf
    • http://shtampshop.ru/surah_yasin_dan_doawxdbp.pdf
    • https://cdn-cms.f-static.net/uploads/4459776/normal_604629477f597.pdf
    • https://cdn.sqhk.co/zepinima/jahcDie/real_tanks_for_sale_usa.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/jenagubadopi/ogilvy_on_advertising_barnes_and_noble.pdf
    • https://s3.amazonaws.com/tawosutosuxi/73698768085.pdf
    • https://s3.amazonaws.com/vuforewebub/bavizaro.pdf
    • https://s3.amazonaws.com/xirixepo/dd_214_separation_codes_usmc.pdf
    • https://s3.amazonaws.com/punurum/47725017281.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_off0000cdcb.bin
5b4cf0aa6298b237a39d574414ff1e94c42166605422edcd681610d63f5f539b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCDCB 5528 bytes
font_01_sfnt_off0000e0d0.bin
c9b6642b366aacf048c29235f1c5bff24546a16d0d7909cdd13768aaef6dd787		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE0D0 10208 bytes

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