Malicious PDF — malware analysis report

Static analysis result for SHA-256 698cb777436a0f9f…

MALICIOUS

PDF

93.1 KB Created: 2021-03-16 00:58:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: c691aa96696c1b0b9654d0577becb0ab SHA-1: ddb6955d724494f24adafef9025b9fe4067b3541 SHA-256: 698cb777436a0f9f97957cdb04612a6a854ea55b016c00cfd13257364e08e059
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://midufefew.ru/123?utm_term=cours+complet+anglais+pdf+gratuit PDF link annotation
    • https://cdn.sqhk.co/gufojakig/hLgiVhc/bodybuilding_jigsaw_puzzles_online.pdfIn PDF document text
    • https://cdn.sqhk.co/bepigulusibe/ibMhh8l/27_amendments_quiz_answers.pdfIn PDF document text
    • http://lunamawel.22web.org/kaabil_full_movie_hd_filmywap_2017.pdfIn PDF document text
    • https://burazukukoxuvi.weebly.com/uploads/1/3/4/0/134096138/radexikef_midoduwoxoxu_gokomemawokev.pdfIn PDF document text
    • https://cdn.sqhk.co/befozaxulot/qO3habu/pepekoxasidapiru.pdfIn PDF document text
    • http://lirepenepubejix.iblogger.org/85368433299.pdfIn PDF document text
    • https://cdn.sqhk.co/lepavenujal/EH4T1jd/pandemic_ebt_ga_activation.pdfIn PDF document text
    • https://nakigere.weebly.com/uploads/1/3/4/6/134608851/5064265.pdfIn PDF document text
    • https://cdn.sqhk.co/fogibadeku/gcgeigv/how_to_use_msc_for_me_app.pdfIn PDF document text
    • http://xugememutan.iblogger.org/verizon_ellipsis_jetpack_4g_lte_review.pdfIn PDF document text
    • https://loroxiboziniluz.weebly.com/uploads/1/3/4/4/134402159/birubosomame_werefenum_nabebajeli_nefuwubajamova.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/rovuweraja/1040553905.pdfIn PDF document text
    • https://s3.amazonaws.com/fazujo/does_nvme_matter_for_gaming.pdfIn PDF document text
    • https://s3.amazonaws.com/selivuvumepaveb/imperator_rome_carthage_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2f79fe0-415c-4bd5-a20f-0de2ba4a00b0/25142389803.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62d003ef-c266-471f-ae69-5a33d8bbba29/how_much_is_a_honda_eu2000i_generator.pdfIn PDF document text
    • http://pimibini.epizy.com/talimuwiputefalotiwizi.pdfIn PDF document text
    • https://s3.amazonaws.com/wovisak/jemuruvuxigexifudasanaxew.pdfIn PDF document text
    • http://tiworetaganufo.epizy.com/microsoft_word_document_background_image.pdfIn PDF document text
    • https://s3.amazonaws.com/rubidokezive/jitegigewudizipawa.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001047e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1047E 6504 bytes
SHA-256: 902da8ff7ad81ce87de4abbfdd53626023fd025e821139dc0b21e5e92a81bbf2
font_01_sfnt_off000114b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114B4 5380 bytes
SHA-256: b219c7ac76edb8a06761e688ca5a88a5db648f240795df902f008c1a520f91ff
font_02_sfnt_off000126ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126EA 12836 bytes
SHA-256: b886768159622fe00d585aff38eead51c42ed4f97c67faa4cb030a9586e700a2
font_03_sfnt_off00014f0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14F0B 16312 bytes
SHA-256: aad9bc0f36eadc3314e08670b59090120051e308b357201f134af3d0b781b2b0

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