Malicious PDF — malware analysis report

Static analysis result for SHA-256 321148e6071507ae…

MALICIOUS

PDF

75.2 KB Created: 2021-03-18 20:32:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 170bd311bd6fef6b9bb3b1dd8adc533f SHA-1: 90e3f8be0433ca1b245ec2108dc3b6cee8e720e5 SHA-256: 321148e6071507ae32543310905e95e5c5a2583aa5656c3ff117c5d869a74b1d
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The presence of numerous external URIs, many pointing to disposable hosting and forming a link farm, strongly suggests a phishing or malware distribution campaign. The document body, though heavily obfuscated, contains metadata related to PDF generation, but the primary malicious activity is inferred from the embedded URLs and the heuristic findings.

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 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://dugedepap.ru/award?keyword=amapola+song+pdf PDF link annotation
    • http://rovanenafet.getenjoyment.net/poemas_libro_la_fuerza_de_sheccid.pdfIn PDF document text
    • http://bigtittybella.com/genozuvarz8eny.pdfIn PDF document text
    • http://daating19.site/how_high_should_a_bench_beb9q0a.pdfIn PDF document text
    • http://whalesqpa.fun/gajakaxepozevojenuz7wmze.pdfIn PDF document text
    • https://dukupifit.weebly.com/uploads/1/3/0/7/130775427/rutoz.pdfIn PDF document text
    • http://betifogolejom.iblogger.org/peq_15_clone.pdfIn PDF document text
    • http://copyrightreports.com/1972oie1e.pdfIn PDF document text
    • https://tezulitu.weebly.com/uploads/1/3/4/3/134316961/zizozimoz.pdfIn PDF document text
    • http://mibijuzorifif.getenjoyment.net/70978973769.pdfIn PDF document text
    • http://jijimaxugixu.22web.org/xeburesujizuka.pdfIn PDF document text
    • http://sewonmedix.ru/best_juice_to_mix_with_crown_royal_peachymjyl.pdfIn PDF document text
    • http://qwonder.space/what_is_the_width_of_a_ford_ranger_truck_bedu7fau.pdfIn PDF document text
    • http://baxagaxisatipa.22web.org/rap_beat_maker_app.pdfIn PDF document text
    • http://llloooodddd.space/dujudiqqc7.pdfIn PDF document text
    • http://wozuxel.getenjoyment.net/medical_terminology_7th_edition.pdfIn PDF document text
    • http://bobujopolodusol.mygamesonline.org/bandaging_techniques.pdfIn PDF document text
    • http://zebatufiduku.22web.org/apex_legends_knowledge_quiz_answers.pdfIn PDF document text
    • http://criticcxck.space/premiere_pro_free_download_for_windows_7_32_bito59l7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://visugog.myartsonline.com/short_autobiography_example.pdfIn PDF document text
    • http://titugol.atwebpages.com/how_to_download_kindle_into.pdfIn PDF document text
    • http://zalatikewal.atwebpages.com/belajar_bahasa_arab_bagi_pemula.pdfIn PDF document text
    • http://wolaniloko.epizy.com/gutipuzukexafebunuta.pdfIn PDF document text
    • http://wenibeliso.atwebpages.com/lg_inverter_v_heat_pump_reviews.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_off0000e780.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE780 5256 bytes
SHA-256: 97f6231d03bd6a390c25780572d8e4256e7b00413a1316821f1f3a58456d620d
font_01_sfnt_off0000f94d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF94D 12632 bytes
SHA-256: 6b8cde8e90e8fd52807f3998e6445b76b5a61af05576abe497fea72755405c8e

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