Malicious PDF — malware analysis report

Static analysis result for SHA-256 1653484dbba00820…

MALICIOUS

PDF

71.5 KB Created: 2021-02-13 02:13:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: b6377afc9943f416602a4cb1bc9c7ed3 SHA-1: bf9801264983f79e8eb52ddd4ced0efdd85b82de SHA-256: 1653484dbba008208537783aea458ffc6e6383febaa7955f3f0b485ce1a8a170
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to disposable hosting or link farms, indicating a phishing or spamming operation. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • 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://jottigo.ru/wix?keyword=watch+nfl+redzone+buffstream PDF link annotation
    • https://newafiramolik.weebly.com/uploads/1/3/1/0/131070062/39da8b.pdfIn PDF document text
    • https://cdn.sqhk.co/daxerarugak/ahhVPIH/zekebulimanugopizunixe.pdfIn PDF document text
    • https://cdn.sqhk.co/numovasovev/0QCvjjU/vovenige.pdfIn PDF document text
    • http://lolafoduluj.22web.org/columbia_river_fishing_report_august_2019.pdfIn PDF document text
    • https://cdn.sqhk.co/tufuboloruj/6OifChb/67872871349.pdfIn PDF document text
    • https://cdn.sqhk.co/zopinulepa/BuRgggf/putasidik.pdfIn PDF document text
    • https://cdn.sqhk.co/posogamumut/ge5ibjb/ear_infection_drops_infant.pdfIn PDF document text
    • http://rodigevofu.iblogger.org/kuvefugoguperewoxame.pdfIn PDF document text
    • http://naturalik.fun/soluk_mavi_nokta_carl_sagan4lmij.pdfIn PDF document text
    • http://usejus.pro/zupajulan70hlt.pdfIn PDF document text
    • http://uuuuull.space/how_to_clone_a_sim_sims_4pjc3r.pdfIn PDF document text
    • https://cdn.sqhk.co/matajikiwov/dhek7gc/sojolupuxufapesofoximu.pdfIn PDF document text
    • https://gilurumujeluzem.weebly.com/uploads/1/3/1/8/131857598/xifumufiwufatexos.pdfIn PDF document text
    • http://fherixq.com/ragnarok_mobile_merchant_alchemist_guidepccif.pdfIn PDF document text
    • http://sotatetivula.iblogger.org/ptcb_study_guide_barnes_noble.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rovikejovejoto.rf.gd/53132705373.pdfIn PDF document text
    • http://zerakunutage.epizy.com/phrasal_verbs_take_exercises_with_answers.pdfIn PDF document text
    • http://kedokonox.rf.gd/realidades_2_capitulo_2a_page_36_answers.pdfIn PDF document text
    • http://fapugiv.rf.gd/allah_allah_tarif_teri_hd_video.pdfIn PDF document text
    • http://vajekalisafemun.rf.gd/futbol_tv_uzreport_dasturi.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c8c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8C3 5464 bytes
SHA-256: 2fa22fd0c054b95444bb79b7570efd620168d3ff686f509a21efd83f9ebbe0c6
font_01_sfnt_off0000db40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB40 9556 bytes
SHA-256: 55fdd275b8be4d25a6cf16137a689414f1d0a1c52475a2db4c9b23cdec8edc77
font_02_sfnt_off0000fbf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBF3 16108 bytes
SHA-256: 2906e013a2c12f8438753706de5a20d0a45d34478d649377d82f29cc76ae0543