Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4618d78755ed858…

MALICIOUS

PDF

88.2 KB Created: 2021-01-26 05:42:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: aee2e279fa971923b6737a9e16277fa2 SHA-1: ffd2f36c8a0d6a95c697c854467f0dbeb8087058 SHA-256: d4618d78755ed858b53e7c71c2da2ab7c3dbd00e269cf67af18a13895dd773dd
184 Risk Score

Malware Insights

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

This PDF file contains multiple embedded URLs, with at least one identified as a malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to lure users to phishing sites or download further malware. The presence of embedded URLs and the nature of the heuristics suggest it's being used as a malicious attachment in a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://traffine.ru/123?utm_term=the+idolmaster+sidem+wake+atte+mini In PDF document text
    • http://kmplitka.shop/pathogenic_microbes_examples8fcjr.pdfIn PDF document text
    • http://ig-copyrightnotice.com/lovudusamno5zz.pdfIn PDF document text
    • https://puzepoxa.weebly.com/uploads/1/3/4/3/134318678/nober.pdfIn PDF document text
    • https://cdn.sqhk.co/raxuzuvuluf/Fjbjh7E/2850276876.pdfIn PDF document text
    • https://lutomired.weebly.com/uploads/1/3/5/3/135316507/084609e567c8.pdfIn PDF document text
    • https://cdn.sqhk.co/feduvefas/kjjP5ie/27259887525.pdfIn PDF document text
    • http://habercigo.com/637084067580pd6.pdfIn PDF document text
    • http://ledy66.net/largest_college_basketball_arena_capacityt85vn.pdfIn PDF document text
    • https://cdn.sqhk.co/dugubupa/Kjbicto/pandemic_unemployment_portal_nj.pdfIn PDF document text
    • https://setuwome.weebly.com/uploads/1/3/0/8/130874340/jozixunaro_fubiwixe.pdfIn PDF document text
    • https://cdn.sqhk.co/mepowokugo/5hkKQVs/janarupemedapafupoj.pdfIn PDF document text
    • http://yandex-delivery.cc/jakazedizeborem9bf.pdfIn PDF document text
    • http://com-signto6.xyz/remudajotefuregawafar4l2ba.pdfIn PDF document text
    • http://ipatovaalena.ru/994360037658ddfq.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dozonox.epizy.com/xeguvuzodojaxud.pdfIn PDF document text
    • https://s3.amazonaws.com/xakapudakadu/70619195482.pdfIn PDF document text
    • https://s3.amazonaws.com/tokit/cerebral_cavernous_vascular_malformations_radiology.pdfIn PDF document text
    • https://s3.amazonaws.com/bogeguva/32500228830.pdfIn PDF document text
    • https://s3.amazonaws.com/firigugixujotov/anne_marie_do_it_right_song.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ecff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECFF 13656 bytes
SHA-256: f251ca711deee72d08230f4253cd20a94b6b4544ee4009dae9af1c1e9527ea48
font_01_sfnt_off0001199e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1199E 5168 bytes
SHA-256: b7a6a5bf0f8931a2c8061963898782ad7b5bc67a851132bea2c0bfe49f45e597
font_02_sfnt_off00012b15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B15 12152 bytes
SHA-256: d76c79815b7b85ca5a83fb85f501383146175fd2459948b33324b051800f88b5

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