Malicious PDF — malware analysis report

Static analysis result for SHA-256 1700cf7ea5f68c3b…

MALICIOUS

PDF

77.7 KB Created: 2021-03-08 21:19:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: ec0b76e2258665114f3518f007c00298 SHA-1: 18ecef7da24aefd3526674c026cfdae7d95d4680 SHA-256: 1700cf7ea5f68c3b990c8a672b1bcfad0fd0df9792f8af2442e30884d59fa229
156 Risk Score

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 0.9993

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://soxebez.ru/123?utm_term=gba+emulator+apk+with+cheats PDF link annotation
    • http://fawikenaxalu.scienceontheweb.net/91449425932.pdfIn PDF document text
    • http://zememor.sportsontheweb.net/59016561735.pdfIn PDF document text
    • https://xikaxuroloxo.weebly.com/uploads/1/3/1/4/131406092/6109229.pdfIn PDF document text
    • https://tasitonedilegu.weebly.com/uploads/1/3/5/3/135301248/ziwobefawexoluv-zumobiru.pdfIn PDF document text
    • http://sutarakikim.scienceontheweb.net/yaesu_ft-450d_specs.pdfIn PDF document text
    • http://dejivuxa.mygamesonline.org/mary_rowlandson_captivity_narrative_themes.pdfIn PDF document text
    • http://jojidasusesot.sportsontheweb.net/official_sat_study_guide_2020_edition_filetype.pdfIn PDF document text
    • http://bizifemodefi.mygamesonline.org/what_are_the_principles_of_instructional_materials.pdfIn PDF document text
    • https://nonelugo.weebly.com/uploads/1/3/0/7/130775267/jaxajelofo.pdfIn PDF document text
    • https://burufazifefep.weebly.com/uploads/1/3/4/5/134584298/72ef573a8e65.pdfIn PDF document text
    • https://mesirurot.weebly.com/uploads/1/3/4/7/134706751/6106065.pdfIn PDF document text
    • http://juwoniki.getenjoyment.net/88284236648.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/pidufozu/worksheet_for_ordinal_numbers_grade_3.pdfIn PDF document text
    • https://s3.amazonaws.com/pisik/cold_blooded_song.pdfIn PDF document text
    • https://s3.amazonaws.com/bisute/bebug.pdfIn PDF document text
    • https://s3.amazonaws.com/vofadoloves/dubai_sports_2_tv_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/xunilukegez/boomer_sooner_ringtone.pdfIn PDF document text
    • https://s3.amazonaws.com/sikuva/oxford_dictionary_apk_data_offline.pdfIn PDF document text
    • https://s3.amazonaws.com/vudivuzakal/45854580125.pdfIn PDF document text
    • https://s3.amazonaws.com/kavifunaruvi/manageengine_netflow_analyzer_configuration_guide.pdfIn PDF document text
    • http://bototiluwoge.atwebpages.com/circle_diagram_of_induction_motor_problems.pdfIn PDF document text
    • https://s3.amazonaws.com/gapivegek/rasanoxafukigedenevo.pdfIn PDF document text
    • https://s3.amazonaws.com/jixerubowi/arthana_vijayakumar_photos.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_off0000f225.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF225 5500 bytes
SHA-256: 55e958a22709aa15d85b410f1a073f323587eb91bf2097161aced4356e1516f8
font_01_sfnt_off000104bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104BF 10808 bytes
SHA-256: 4bdfff35ce03f1b60ada88b22594fe5643b4c2871faf273457695a33010be999

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