Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d5d3f75c8123ae7…

MALICIOUS

PDF

67.2 KB Created: 2021-01-26 09:10:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 3c417c66a81e33d2c64dc089a1af5f99 SHA-1: e05e23034593e9059e897e9b90236196ccbf8c90 SHA-256: 9d5d3f75c8123ae7e53d56ad31432f2ab3391f29fb69c291302dad544a91b9cc
104 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is a PDF that has been flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL pointing to 'baarspo.ru', which is likely used to deliver a secondary payload or redirect to a phishing site. The heuristic 'SE_DOWNLOAD_BUTTON' suggests a lure to trick the user into downloading content, aligning with a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://baarspo.ru/123?utm_term=volume+of+pyramids+cones+and+spheres+worksheet+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4485162/normal_5fd8f8a5a844e.pdfIn PDF document text
    • https://cdn.sqhk.co/zowesifona/N2hgics/86309153848.pdfIn PDF document text
    • https://cdn.sqhk.co/lolajelor/oOBC8ji/3286284170.pdfIn PDF document text
    • http://lnstagramcopyrightservices.org/lujatibuwovotufemosazenat1mnf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471995/normal_5ff4a57248063.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392651/normal_6008fe05ecae9.pdfIn PDF document text
    • http://lunesygets.xyz/agl_energy_ltd_share_pricea7w6p.pdfIn PDF document text
    • https://cdn.sqhk.co/lijipatalenu/LhbWIYE/nakutalejidinif.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375203/normal_6005216812a3e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494674/normal_5ff90c4680c4d.pdfIn PDF document text
    • http://kind-insta.site/dujifirojemafawuzobk7eli.pdfIn PDF document text
    • http://healthyforczechrepublic.site/war_of_1812_significance_to_canada0qgx3.pdfIn PDF document text
    • http://edalovert.xyz/crunchyroll_premium_not_working_vrvk4grf.pdfIn PDF document text
    • http://biomanix.best/adidas_neon_green_running_shoes0ma52.pdfIn PDF document text
    • https://cdn.sqhk.co/vipatemeluti/ajihcY2/werutugoporetoxalapi.pdfIn PDF document text
    • http://auth02mobility.com/tusotugoxev62fc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zumebixakefeta.epizy.com/nclex_infection_control_study_guide.pdfIn PDF document text
    • http://razogop.epizy.com/62478521133.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cb25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB25 5616 bytes
SHA-256: b482f80c9c01a1161c4d05fe50e503268b36fc3716c82ba7291dea90f4a85594
font_01_sfnt_off0000de36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE36 9692 bytes
SHA-256: 0c4a4b765800009d351167ba36bac12954cc7598c202ca913de63e5ef6c50b6d

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