Malicious PDF — malware analysis report

Static analysis result for SHA-256 5700e9ecd45f9513…

MALICIOUS

PDF

73.2 KB Created: 2021-03-02 10:45:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 9c5fb13b72ee7efd80df49df12cf3df4 SHA-1: 19f692708dc17dbede848d8ddd08b60000f6f37d SHA-256: 5700e9ecd45f9513a621a122d8358423c619c5da8c8a979b567f8bdf8046a366
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9997

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://xajibur.ru/123?utm_term=learn+java+programming+free+video+download PDF link annotation
    • http://tafuxasomup.getenjoyment.net/does_netflix_have_the_movie_the_secret_dare_to_dream.pdfIn PDF document text
    • https://fogasofimoxor.weebly.com/uploads/1/3/1/0/131071298/lirolizererenenibuk.pdfIn PDF document text
    • http://rivimebowov.22web.org/sql_server_management_studio_2016_tutorial.pdfIn PDF document text
    • http://detonic-de.website/5281357653nu5b.pdfIn PDF document text
    • http://simopuvoramawu.mywebcommunity.org/cuanto_son_250_gramos_de_azucar_en_tazas.pdfIn PDF document text
    • http://begetus11ppz.xyz/machine_gun_kelly_merch_delayumrwz.pdfIn PDF document text
    • http://physcoo.com/photo_mixer_for_pc_free_download0mdyo.pdfIn PDF document text
    • http://leadtop.co/vepozutiturawofixabixawxk6.pdfIn PDF document text
    • http://tizeretozu.22web.org/how_to_operate_altec_bucket_truck.pdfIn PDF document text
    • http://guwobedegaf.22web.org/osmosis_imdb_parents_guide.pdfIn PDF document text
    • http://java67.comForIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sogivuwe.onlinewebshop.net/how_do_you_write_a_scholarship_essay_about_yourself.pdfIn PDF document text
    • http://fiwiduropewoxo.rf.gd/zetevedam.pdfIn PDF document text
    • https://s3.amazonaws.com/turip/jegulabutorajagivelozive.pdfIn PDF document text
    • http://xopezolesuvobut.rf.gd/celebrity_x_factor_rugby_players_performance.pdfIn PDF document text
    • http://javarevisited.blogspot.comIn 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_off0000e178.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE178 5352 bytes
SHA-256: b5fd357ccb831c89b2e18b1bd30aac08ae99651e046357df6744771beacbb7b9
font_01_sfnt_off0000f3bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3BC 10636 bytes
SHA-256: 7357acf7188444deb96650a12391b66648fe8bbb69d65ee9885337931b9dcfd8