Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5e53b37fc977f27…

MALICIOUS

PDF

96.9 KB Created: 2021-03-28 15:43:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 9e84fe10f2f6320e134bdec33549765f SHA-1: ea070830706b93fd83ffd80c9371a8fdc94ccd36 SHA-256: b5e53b37fc977f277ba32d8411768fd9709d25e0bdc2c352e466c39a979e0e65
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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=candidiase+cronica+tratamento+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4426972/normal_5fe493b7556fc.pdfIn PDF document text
    • https://cdn.sqhk.co/dugelabomaw/VShbjjp/nicki_minaj_songs_2014.pdfIn PDF document text
    • https://cdn.sqhk.co/lebapivi/3jchbhj/robyn_dancing_on_my_own_song_meaning.pdfIn PDF document text
    • https://cdn.sqhk.co/momajuxu/igcihii/33586761991.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484358/normal_5fcf7485d5272.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447884/normal_5fd317cf710dd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416140/normal_5ff85a7e1898a.pdfIn PDF document text
    • http://lafilubepojev.scienceontheweb.net/wesopa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481830/normal_601fea238a06e.pdfIn PDF document text
    • http://jixazepo.mywebcommunity.org/basic_english_grammar_1_2.pdfIn PDF document text
    • http://nitapida.mywebcommunity.org/angina_estable_e_inestable.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/tasufagijaremo/pabenejufe.pdfIn PDF document text
    • https://f4ef19d8-372f-49db-bbb6-0f5e16bfa625.filesusr.com/ugd/070799_d0a3af0c30a44483ad4d692e2bfb9416.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sagotomagin/stephen_king_novels_made_into_movies.pdfIn PDF document text
    • https://s3.amazonaws.com/dowadotiju/public_health_policy.pdfIn PDF document text
    • https://s3.amazonaws.com/zagapaxa/89760749691.pdfIn PDF document text
    • https://s3.amazonaws.com/fogibi/93079067798.pdfIn PDF document text
    • https://s3.amazonaws.com/sajatesawodiji/orchestral_vst_free.pdfIn PDF document text
    • https://s3.amazonaws.com/wemofodi/angular_2_formgroup_disabled_input.pdfIn PDF document text
    • http://vigexosav.myartsonline.com/15344576302.pdfIn PDF document text
    • https://dc273c12-e125-4738-b2e6-b96bc4bd5eb7.filesusr.com/ugd/c8df25_f03e4cdf90d94e30b6fdcd483d5639d0.pdf?index=trueIn PDF document text
    • https://a7193630-a032-4ee2-b136-33837135b76a.filesusr.com/ugd/fac845_f9b3bbf57c0b406f9db90438e4536b70.pdf?index=trueIn 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_off00013a87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A87 5172 bytes
SHA-256: 0e7b7490f1ba67f486dba934d63f50931a550569cba27e635107733e467f9343
font_01_sfnt_off00014c05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C05 13836 bytes
SHA-256: f11ea0f16cfa53257f24727e283cc1948c9c6a4c5d9d0caee992eebc0d1701fe

Open this report in the interactive analyzer, or submit your own file for analysis.