Malicious PDF — malware analysis report

Static analysis result for SHA-256 663bc833da29744f…

MALICIOUS

PDF

67.3 KB Created: 2021-03-02 14:16:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 60c66106bd80aa7666f84310b636974f SHA-1: 7cb9744b57c25c722d0bf2041556f045e8663e90 SHA-256: 663bc833da29744f972264a5bcb50aee83e0b377c4e8cfb0c197800f5c5865d9
136 Risk Score

Malware Insights

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

The PDF contains heuristics indicating it is a phishing lure, specifically using an SEO redirector to disguise a download link. The embedded URL 'https://nipisod.ru/123?utm_term=brookstone+grill+alert+app+iphone' suggests a pretext related to a product alert. Although no scripts were directly extracted, the PDF structure and the presence of multiple external URLs point towards a malicious intent, likely to deliver a second-stage payload or phish for credentials.

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://nipisod.ru/123?utm_term=brookstone+grill+alert+app+iphone PDF link annotation
    • http://leledup.mypressonline.com/graphic_design_programs_for_chromebook.pdfIn PDF document text
    • https://cdn.sqhk.co/sizafutito/939jihc/zivajomigigugesawa.pdfIn PDF document text
    • http://milanomoda-italy.site/24849046366wacrw.pdfIn PDF document text
    • http://stroy-level.ru/texas_instruments_ti-30xa_resetgdehy.pdfIn PDF document text
    • https://cdn.sqhk.co/vipujitebiki/agfCaxJ/turbo_kit_for_2004_5._3_silverado.pdfIn PDF document text
    • https://s3.amazonaws.com/wexoteluwag/73499830455.pdfIn PDF document text
    • http://natorg.fun/algebra_de_baldor_pag_161_ejercicio_98_resueltohfsbd.pdfIn PDF document text
    • https://s3.amazonaws.com/julexekubaj/why_my_smart_tv_wont_connect_to_the_internet.pdfIn PDF document text
    • https://s3.amazonaws.com/vixuwogetiv/9632449755.pdfIn PDF document text
    • http://fobativ.mywebcommunity.org/xiwixanagodukado.pdfIn PDF document text
    • http://afracheat7.xyz/is_nikon_d40_still_a_good_cameraao4gb.pdfIn PDF document text
    • http://freshmind.net/ip_man_3_parents_guidel6u7e.pdfIn PDF document text
    • https://cdn.sqhk.co/vumusokutil/Dgijfjj/beli_pulsa_listrik_bayar_belakangan.pdfIn PDF document text
    • https://s3.amazonaws.com/wujodibu/brother_tn_420_toner.pdfIn PDF document text
    • http://sberetransfer.online/eulogy_template_for_dad_ukxgjkx.pdfIn PDF document text
    • http://watertea.space/51043203295ninib.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gonegexunu.myartsonline.com/tecumseh_carburetor_replacement_parts.pdfIn PDF document text
    • http://naburonip.myartsonline.com/conexant_audio_driver_windows_10_dell_inspiron.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_off0000ca2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA2C 5196 bytes
SHA-256: ef4fb39aa4e30f4deeaf3117a40a4a95e53ce3e7f6b5efa46c01b7a176e18316
font_01_sfnt_off0000dbd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBD6 10676 bytes
SHA-256: 6d340add7d92d0883f618e8ca87b27974aa06deaf0fe3f1db8d36667a32494df

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