Malicious PDF — malware analysis report

Static analysis result for SHA-256 5dfe4792b33501d6…

MALICIOUS

PDF

73.2 KB Created: 2021-02-08 23:05:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 249388ee8fba67baa19f3d95c57e5f70 SHA-1: 37436b49b4f9f04715b96a521c17c9262c70fd14 SHA-256: 5dfe4792b33501d6a25856a92011af0fd2dc54c5ab11dcbe510159d3b39cdc31
184 Risk Score

Malware Insights

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

The sample is identified as malicious by multiple heuristics and a machine learning classifier, specifically flagging it as a PDF redirector and phishing attempt. It contains numerous embedded URLs pointing to potentially malicious or disposable domains, with one URL explicitly identified as a redirector. The PDF structure itself does not contain executable scripts, but its primary function appears to be directing users to external, untrusted content.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/aws?utm_term=ishihara+color+blindness+test+38+plates+pdf In PDF document text
    • http://tersq.space/2600988489425mvd.pdfIn PDF document text
    • https://cdn.sqhk.co/ragojagef/zggifje/nfl_games_today_live_stream_free.pdfIn PDF document text
    • http://prazdnikprosto.ru/36106311324swf3f.pdfIn PDF document text
    • http://ourfanz.com/73345809285emjvu.pdfIn PDF document text
    • http://shopeuro.pro/vobezebataditebetadap8t64l.pdfIn PDF document text
    • http://mmeueue.space/restore_backup_viber_messages_androidv35cn.pdfIn PDF document text
    • http://huaweistoreukr.xyz/4533505078476b1g.pdfIn PDF document text
    • http://spoonnumberone.xyz/softonic_for_windowsgo4lj.pdfIn PDF document text
    • https://teribupugabi.weebly.com/uploads/1/3/4/8/134852699/burowin_tazonudusaromo_zamotogisiziko_pudovubekiroz.pdfIn PDF document text
    • http://idealica-italiauficiale.website/669248932673og9q.pdfIn PDF document text
    • https://cdn.sqhk.co/jirudumom/cxfjiif/943729019.pdfIn PDF document text
    • http://vavesojijakoju.iblogger.org/lineage_2_revolution_dwarf_slayer_skill_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/rabataxuvax/dyojbZh/zifovibudujosemirimefuxew.pdfIn PDF document text
    • http://jilet2.club/87550531699ywdjd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rufofexejojar.epizy.com/multiplication_and_division_of_algebraic_fractions.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 8

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_off0000df83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF83 5680 bytes
SHA-256: f0075a193aa31f3da10dc81465bf9a825dba54fa5df19f60347788976f5e3cc7
font_01_sfnt_off0000f2c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2C8 10716 bytes
SHA-256: 44df7f36b51bc53b7ffc0268862fa4cb799b8e6ae9ad208c1dac616956b93e0c

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