Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0cbca6b31547914…

MALICIOUS

PDF

87.9 KB Created: 2021-03-29 14:58:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f2564095535aa0c7170b99accca6cead SHA-1: 7010d81a0776595aa22cfd5c6159f17dac792d2d SHA-256: d0cbca6b31547914b9af89577e27fe56fbea39073126bb80729e67fd19712aaf
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which are part of a link farm designed to manipulate search engine results. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically phishing. The presence of external URIs and the link farm heuristic suggest the document is intended to redirect users to malicious websites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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-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://zajinet.ru/wix?keyword=raze+2+unblocked+games+66
    • https://cdn.sqhk.co/sesijisova/gdggih0/barefesazutozofutolinotu.pdf
    • https://cdn.sqhk.co/mafowixodi/haOiiif/63528302973.pdf
    • http://bosemefawixuwov.mypressonline.com/gasopebol.pdf
    • http://goldenframecollision.com/xezevirajoboxokbeze8.pdf
    • https://gilepijojuju.weebly.com/uploads/1/3/2/7/132740412/tumowidepiwogujizox.pdf
    • http://salonly.xyz/how_to_use_a_craftsman_6_gallon_air_compressorobyqf.pdf
    • https://cdn.sqhk.co/kamugututu/iinHjcL/voltage_drop_across_capacitor_and_resistor.pdf
    • https://cdn.sqhk.co/dikapagoloza/Pji7hdY/corporate_strategic_planning_steps.pdf
    • http://logvoz.ru/dusezetosedubupenukix2njb.pdf
    • http://jarevine.mywebcommunity.org/how_to_apply_ortho_glass_splint.pdf
    • https://cdn.sqhk.co/pabelemusib/chnTlie/top_open_world_games_for_android_2020.pdf
    • https://cdn.sqhk.co/vabedesi/ejjShfY/70011285444.pdf
    • http://damvglaz1.xyz/a_nice_cup_of_tea_book_by_celia_imriehzp2u.pdf
    • https://baboxubawuxi.weebly.com/uploads/1/3/4/6/134666135/lezafadi.pdf
    • http://teaapple.space/1965_beechcraft_musketeer_a23_performancedf2u2.pdf
    • http://lnstagramcentre.net/excel_survey_data_analysis_template_xlsrbcid.pdf
    • https://pukotegifo.weebly.com/uploads/1/3/0/8/130874060/4404422.pdf
    • http://fullpisetc.ru/tofuvivuvivudiluxisolofhf0xo.pdf
    • https://zizudenavoxe.weebly.com/uploads/1/3/4/0/134017195/silofunejo_zopes_kiwawaxoro.pdf
    • https://cdn.sqhk.co/busosuwik/h1jgjaH/biwepetosepajokoluze.pdf
    • https://cdn.sqhk.co/nozelenid/LKNAjeU/happy_birthday_cake_pic_with_name_and_photo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://juzapurul.onlinewebshop.net/bod_determination_by_winkler_method.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_off00011bc2.bin
96daad3fc9a4aac201e323c6529e41529e2945493ca20cd7ffb09d0012820c2f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11BC2 5712 bytes
font_01_sfnt_off00012f35.bin
8b1e24cfece5256eca615f39eb4f56de7d1a153258ea91ad8fc2d76adf882239		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12F35 10344 bytes

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