Malicious PDF — malware analysis report

Static analysis result for SHA-256 89f7d491656a08fa…

MALICIOUS

PDF

76.9 KB Created: 2021-03-17 07:45:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c73c4efe16bbf3ca7697a98b17f9f69e SHA-1: 5c3082ad26943bfe0853a314174d60bf88507843 SHA-256: 89f7d491656a08fa38ba90935a2e03e250f876c7667fb0e671f36a115320ca91
154 Risk Score

Malware Insights

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

The file is a PDF document flagged by multiple heuristics as malicious, including a critical finding for linking to known malicious redirector infrastructure. The ML classifier also assigned a high probability of maliciousness. The embedded URLs suggest a phishing or malware distribution attempt, likely leveraging the document's apparent content as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://yafferge.ru/award?keyword=normal+probability+distribution+worksheet+pdf
    • http://bluebadge-support.com/warhammer_40k_harlequins_codexlfvz5.pdf
    • http://gratoramaa.space/52560422600x94v8.pdf
    • http://meine-gebuhrenfrei.com/jizowizipopuhps.pdf
    • http://kufomabid.mywebcommunity.org/pdf_to_word_online_converter_free_download.pdf
    • http://gnoogle.site/nugotipekp014.pdf
    • http://tulomodev.getenjoyment.net/biochemistry_krok_questions.pdf
    • https://metasabuvaro.weebly.com/uploads/1/3/2/6/132681671/ropujelovuba-bozalijenuw-tifutikomu.pdf
    • https://panidulupeju.weebly.com/uploads/1/3/0/9/130969186/joxalolon_mowedik.pdf
    • https://mudulavodeg.weebly.com/uploads/1/3/1/0/131070753/rudoxekodejimigu.pdf
    • http://trenketo.buzz/zijafewipavaviwapudemojawcjm5p.pdf
    • http://mxbur.fun/postage_label_template_wordjeu4o.pdf
    • http://tanolugulutewu.medianewsonline.com/fundamentos_tecnicos_del_voleibol_wikipedia.pdf
    • http://form-lnstagramcopyrightservices.com/886118790417c4gd.pdf
    • http://select-get.top/jabolamivotijokeduwex3azw.pdf
    • http://item-get.top/balloon_slingshot_for_salekjxhd.pdf
    • http://totipuzuforaz.mywebcommunity.org/kawiniketuritebubebividum.pdf
    • http://dfahsdfgjsfg.online/social_impact_assessment_process7fjok.pdf
    • https://xakirajurupani.weebly.com/uploads/1/3/2/3/132303083/mazilig.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/tikofaketonub/building_plan_design.pdf
    • https://s3.amazonaws.com/fomaralunex/california_dreamin_guitar_tab.pdf
    • https://uploads.strikinglycdn.com/files/59e0a022-89e2-4f6c-8095-59e745fda3d6/tebeberafikaj.pdf
    • https://uploads.strikinglycdn.com/files/1247f607-c628-408d-ac7b-aa2bf94cccc9/craftsman_lt1500_mower_deck_belt.pdf
    • https://uploads.strikinglycdn.com/files/f8bb16f0-c9b5-479d-9d0b-6ed15e41e6d3/46770892205.pdf
    • https://s3.amazonaws.com/jodabiladezot/wokimijoxubofavino.pdf
    • https://uploads.strikinglycdn.com/files/f22b8efb-e087-4e6e-8b50-62ef48bdcc1b/garuwewuxepilonir.pdf
    • https://s3.amazonaws.com/xazarujokemus/kaplan_mcat_biology_review_notes.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_off0000ea07.bin
da8e181426284119bbe0d69671bdac075ee43685cc694525ee6237612dd1af2b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEA07 5648 bytes
font_01_sfnt_off0000fd24.bin
288e1086e8a796a2796b45522525ef7c7185c787c7be356c57e26f5bb553afe1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFD24 11488 bytes

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