Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ff740bc11cdf3f1…

MALICIOUS

PDF

72.3 KB Created: 2021-02-28 17:54:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 5101dca699697dbde71f6d544fda3529 SHA-1: bc35443abe43aed3048d6a5841209909a577d8dd SHA-256: 7ff740bc11cdf3f1f1228457f45b021249c29dcc3373b3c18715923497a52877
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which are associated with link farms and disposable hosting, suggesting a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, contains references to 'Firefox free download', aligning with a lure to trick users into visiting malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://botokaw.ru/123?utm_term=firefox+43.0.1+free+download PDF link annotation
    • http://o-karte-kopilka.com/17561839412k4caa.pdfIn PDF document text
    • https://dusalunefawotof.weebly.com/uploads/1/3/4/4/134487283/suteguwibixapi.pdfIn PDF document text
    • http://snegny.com/does_stretching_everyday_make_you_more_flexiblejbf1o.pdfIn PDF document text
    • https://s3.amazonaws.com/radubozufiwo/tabapuwix.pdfIn PDF document text
    • https://cdn.sqhk.co/melipetoluf/dnVIiiw/laruvakoxuvidebifuzonaz.pdfIn PDF document text
    • http://sell-toclick.online/timupikeketirdl120.pdfIn PDF document text
    • https://cdn.sqhk.co/mibuguxinise/yuidfjd/best_masterchef_desserts.pdfIn PDF document text
    • https://damobupakul.weebly.com/uploads/1/3/1/4/131453350/6596870.pdfIn PDF document text
    • https://s3.amazonaws.com/podawakumepewez/spotify_premium_apk_free_music.pdfIn PDF document text
    • http://kutatit.getenjoyment.net/81867351680.pdfIn PDF document text
    • https://kotasixunepa.weebly.com/uploads/1/3/0/7/130776076/pukozixumigibowubapu.pdfIn PDF document text
    • https://cdn.sqhk.co/wexunaveb/ibxpEjb/rejipabigodazaranisomi.pdfIn PDF document text
    • http://wejuzofibab.medianewsonline.com/42726172395.pdfIn PDF document text
    • https://s3.amazonaws.com/vefagotoje/apa_referencing_style_2015.pdfIn PDF document text
    • https://zevakevo.weebly.com/uploads/1/3/5/4/135400716/dusat_timabij_ziziwirizedira_wojetif.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tiwosutodegadax.onlinewebshop.net/69230347320.pdfIn PDF document text
    • http://sabiwilurase.atwebpages.com/bukotoxodopawo.pdfIn PDF document text
    • http://molagegivijoxu.onlinewebshop.net/sharepoint_online_training_courses_free.pdfIn PDF document text
    • http://sabiwilurase.atwebpages.com/volando_sobre_el_pantano_audiolibro.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

Related samples 6

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD7B 5316 bytes
SHA-256: cc4f557ec69d8aed42c678543c2d75b2f2d64c88361a6cbc432e4633100ce0d8
font_01_sfnt_off0000efce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFCE 10300 bytes
SHA-256: 410abfd483cdbca8e35381e37ded093e48171c34b6be14f4b1797b64220332a9

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