Malicious PDF — malware analysis report

Static analysis result for SHA-256 afd0ac5171c14143…

MALICIOUS

PDF

68.8 KB Created: 2021-04-04 15:48:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: c0d5c0472898caf06706bc3f2d0fb1b7 SHA-1: 9100e1bdd5bd9e74560afb1d999b3036e57ed6de SHA-256: afd0ac5171c141437d9aca8c89eee2fa2685dabc9348ff5389d132da2c545e43
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 unknown or potentially malicious domains, suggesting a link farm or phishing attempt. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a lure to a malicious website.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://seumenha.ru/award?keyword=algorithm+design+techniques+karumanchi+pdf PDF link annotation
    • http://pearhaidhr.fun/www.bpsc.gov.bd_non_cadre_resultik6no.pdfIn PDF document text
    • http://prostosite.site/afterglow_wireless_headset_for_xbox_oneugysd.pdfIn PDF document text
    • http://dream-stat.ru/17360047644733ci.pdfIn PDF document text
    • http://creditreportusa.info/twilight_eclipse_trailer_deutschxonra.pdfIn PDF document text
    • http://hs-life.ru/82279965561xfjcf.pdfIn PDF document text
    • http://clipshd.design/botifejurujezebowovacyffr.pdfIn PDF document text
    • http://hargotel.xyz/wing_chun_forms_step_by_stepgdv6l.pdfIn PDF document text
    • http://duplicwcnj.space/34966917082vbise.pdfIn PDF document text
    • http://vbruti.site/iowa_state_university_financial_aid_forms6opzi.pdfIn PDF document text
    • http://belldiscount.ru/68067684813xpy97.pdfIn PDF document text
    • http://rastet-malysh.ru/96010613659m5mj.pdfIn PDF document text
    • http://mists.space/hobart_handler_140_reconditionedcwusc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/kesumasaka/cpf_annual_report_2011.pdfIn PDF document text
    • https://s3.amazonaws.com/jenisozazewubo/pawimugukotonegej.pdfIn PDF document text
    • https://s3.amazonaws.com/kibavutibeved/firebreather_cartoon_network_full_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/xisefowu/skype_desktop_old_version.pdfIn PDF document text
    • https://3df06c22-1e8a-4082-8cc2-a0fdc0609706.filesusr.com/ugd/d86e81_880f6cb3a65e42f180f483bba7a908dc.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/towutoginadivu/sudozo.pdfIn PDF document text
    • https://ad323f3e-245e-4e3c-8b16-de91fefec063.filesusr.com/ugd/5ea691_ec8a7a647ac2455e919dab326304cb59.pdf?index=trueIn PDF document text
    • https://69f7c7ec-f776-4f8b-90c4-e8126cd531e3.filesusr.com/ugd/772020_769adc9949324288912040cbf0810d5c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fizup/i_wish_you_more_read_aloud_online.pdfIn PDF document text
    • https://s3.amazonaws.com/xesigeze/nevedap.pdfIn PDF document text
    • https://65d0a56f-4074-4e8f-9acc-29e6f8e8f663.filesusr.com/ugd/37655d_932e56ea981047d5af00763d92c04eda.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tafogusegabomu/pivexoxezuserok.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_off0000ce8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE8A 5748 bytes
SHA-256: 440e4173efdfeb5bbdd1e148eeb64e9793a4187e8964fc7c458a792907b0b062
font_01_sfnt_off0000e1e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1E9 10412 bytes
SHA-256: 716571480c35df6ec0de868a37c73e9ea11d0f749e94d52724db3b115c975066

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