Malicious PDF — malware analysis report

Static analysis result for SHA-256 b047995683958338…

MALICIOUS

PDF

93.0 KB Created: 2021-03-20 05:51:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f775c1c1d692c6936425898b2f6523c5 SHA-1: d1e37502964f3bcb32acbaeaf68679b5cde79c0f SHA-256: b047995683958338aea5e1703224f3a67e8f5f4a8a5389fb4d19fa4e31652c3c
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many of which are to potentially malicious domains, suggesting a link farm or phishing attempt. The ClamAV detection and ML classifier strongly indicate malicious intent. Although no scripts were explicitly extracted, the presence of embedded URLs and the overall structure point towards a malicious document designed to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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-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://jumiwimov.ru/wix?keyword=ap+statistics+test+8d+answers
    • https://cdn.sqhk.co/xufatirumina/e3jgicU/bolimogenenorurosipuzud.pdf
    • http://vozuzutiwajuzip.getenjoyment.net/largest_economies_of_the_world_ranking.pdf
    • https://cdn.sqhk.co/wotutovebo/tGiijgR/3495756442.pdf
    • https://cdn.sqhk.co/bexefoboxevi/jjhjfhf/vekalobomu.pdf
    • https://cdn.sqhk.co/litametun/Jujiift/galaxy_grand_prime_plus_phone_case.pdf
    • http://ruvujagefeko.mygamesonline.org/kujir.pdf
    • https://cdn.sqhk.co/wapadofiwe/d1ydgjS/hack_para_need_for_speed_no_limits_2020.pdf
    • https://cdn.sqhk.co/farafakilof/hjlhgjg/ultimate_ninja_blazing_mod_apk_2._23._0.pdf
    • http://zodatowafe.getenjoyment.net/vepobewowojuril.pdf
    • https://cdn.sqhk.co/konafomaz/jjjhh03/vuposetezokezukixuvodew.pdf
    • https://cdn.sqhk.co/mivufarowiwi/6yDOLFz/29555199796.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/cd340c3e-7151-49ee-80a4-abb154e67454/what_is_the_ugliest_flag.pdf
    • https://uploads.strikinglycdn.com/files/8caac836-1bcc-4b48-ac58-ed16b54e9876/mifunanataladofori.pdf
    • https://79e5ec13-148a-49e7-9308-7b7844992bd9.filesusr.com/ugd/1d149b_cad9d736f861480ea58f3ea5431f6379.pdf?index=true
    • http://nibemodida.myartsonline.com/39732263991.pdf
    • http://teluroluxeterez.myartsonline.com/twin_baby_babble_game_answers.pdf
    • https://49b7c339-fea6-4bb3-bf7b-ca47af5263df.filesusr.com/ugd/6ca12d_2478bb14163743b0a80c1b15d30c0a26.pdf?index=true
    • https://d70b1dc8-7d09-4148-9854-e6a7cae1b87b.filesusr.com/ugd/5899d5_24c7b43f4b3341c6b1d3e0fccc254c3d.pdf?index=true
    • https://2aa89031-56ac-4de1-b828-aabe99840ec8.filesusr.com/ugd/cf14a4_200edd02eb91445781d6378e3a4a3804.pdf?index=true
    • https://uploads.strikinglycdn.com/files/eda4c37e-c8fa-4e2a-84f4-6f7bbe0e96de/zogeredavojiluguvesukorev.pdf
    • https://acfcda0b-1795-4b40-aedc-9a0bc13047ce.filesusr.com/ugd/89c6ad_d44f15d3d6f74100af504b430085966c.pdf?index=true
    • https://645c32c3-7e99-4959-b93b-7980205539d7.filesusr.com/ugd/30a31c_f73867517c754630bf3b72eef92e004a.pdf?index=true
    • https://a49aa754-465e-4bbd-924e-b3d0e7b66bd4.filesusr.com/ugd/81d6a4_81f915cc1482408eaecac83741f67bfd.pdf?index=true
    • 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_off00012a46.bin
9acf16d8e170b5837689a533a053126ca3be26f3a3352f51bef03e253e4e2d88		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12A46 5312 bytes
font_01_sfnt_off00013c74.bin
71714fbfb4f0d24e6229441b23f343f6a1088f76719255fde8d32c5a4894ee82		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13C74 12572 bytes

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