Malicious PDF — malware analysis report

Static analysis result for SHA-256 7cc2604dfb64798f…

MALICIOUS

PDF

79.6 KB Created: 2021-04-26 16:45:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: e1045d0b65cc7ebcc3d021b547c750a6 SHA-1: d7d8d46fe12d22d8ab39f0ec512699f7779834b3 SHA-256: 7cc2604dfb64798f248434c97f233002b21e40b83a58d5bc5c01028becb8884f
196 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics, including ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many of which are SEO-optimized and point to redirectors, suggesting a phishing or content-luring scheme. The presence of an embedded URL and the overall structure point towards an attempt to distribute further malicious content or lead users to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://pelibifir.ru/strik?utm_term=no+homework+pass+in+spanish PDF link annotation
    • http://pidusejop.medianewsonline.com/vector_calculus_lecture_notes.pdfIn PDF document text
    • http://luwinilulurop.mywebcommunity.org/life_fitness_ic5_indoor_cycle_w_console.pdfIn PDF document text
    • http://pagavopalubutu.scienceontheweb.net/62059360999.pdfIn PDF document text
    • http://xuxadozikekop.iblogger.org/25459076084.pdfIn PDF document text
    • https://sitegevom.weebly.com/uploads/1/3/4/6/134664280/notapeva_vamebivim.pdfIn PDF document text
    • http://mapotilij.mygamesonline.org/tidoba.pdfIn PDF document text
    • http://zujadise.scienceontheweb.net/59020070773.pdfIn PDF document text
    • http://voxofixixaj.iblogger.org/95466595316.pdfIn PDF document text
    • http://gizovivomiz.getenjoyment.net/are_oil_filled_space_heaters_efficient.pdfIn PDF document text
    • https://kusafulidofet.weebly.com/uploads/1/3/4/0/134017607/xejidimezodemolel.pdfIn PDF document text
    • https://mimidozeze.weebly.com/uploads/1/3/4/3/134357816/3087160.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/vavabi/mk6_jetta_manual_transmission_fluid_change.pdfIn PDF document text
    • https://s3.amazonaws.com/veledabejufi/27903742891.pdfIn PDF document text
    • https://s3.amazonaws.com/pirofopafu/los_cinco_lenguajes_del_amor_descargar.pdfIn PDF document text
    • https://s3.amazonaws.com/xozeb/which_class_should_i_choose_in_diablo_3.pdfIn PDF document text
    • https://s3.amazonaws.com/faxaxos/how_to_update_garmin_nuvi.pdfIn PDF document text
    • http://jatugeset.atwebpages.com/40808016894.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxenipup/45354788484.pdfIn PDF document text
    • https://s3.amazonaws.com/xufoxorog/broadsheet_perth_new_restaurants.pdfIn PDF document text
    • https://s3.amazonaws.com/tobojelusiwi/beretta_m9_22lr_magazine.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_off0000f764.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF764 5152 bytes
SHA-256: 0676fe77b136a375dc109e4fcb6800bc38387a79dd997f44cb8dcaf3095ce6a4
font_01_sfnt_off000108cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108CD 11404 bytes
SHA-256: ae4d9930dbffbc1b6bca80e7910141ecdb4fd8eec39adcd3bd803ddbc6d6e5de

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