Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6587784ca6229d5…

MALICIOUS

PDF

92.8 KB Created: 2021-02-21 07:46:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 19223549297adda725ee0f9ec95eaf39 SHA-1: 3e0149cc90bfa184946beeb72995e9547fd081d5 SHA-256: d6587784ca6229d5b48faadbe6515db44cfe190e85f9364f845055fa2378a514
234 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating malicious redirector links and phishing lures. The ML classifier and ClamAV detection strongly suggest malicious intent. The embedded URLs, particularly 'https://crophysi.ru/strik?utm_term=types+of+literary+analysis+theories' and 'http://securitycheckingbrowservkcom.xyz/anabolic_steroids_effects_on_sports_performancesu7pj.pdf', are likely used to direct users to phishing or malware-hosting sites. Although no scripts were explicitly extracted, the PDF structure and link analysis point towards a phishing attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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.
  • Image-heavy PDF with invisible link to suspicious domain high PDF_SUSPICIOUS_LINK_LURE
    PDF is a small image-heavy lure with invisible link annotations that send the user to a suspicious high-risk-domain URI. This matches credential-phishing carriers where the visible document is only a prompt and the real collection flow happens on the linked website.
  • 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://crophysi.ru/strik?utm_term=types+of+literary+analysis+theories In PDF document text
    • https://static.s123-cdn-static.com/uploads/4415936/normal_5ffff6f0235c4.pdfIn PDF document text
    • https://cdn.sqhk.co/sadirurafixi/hhcIMgi/7566101198.pdfIn PDF document text
    • https://cdn.sqhk.co/vovewotutal/bxDdig3/tozapabawixizuvolixer.pdfIn PDF document text
    • https://cdn.sqhk.co/sadirorig/FAgfH0A/27007416161.pdfIn PDF document text
    • https://cdn.sqhk.co/dojatejij/MrP3jcQ/77153824461.pdfIn PDF document text
    • http://hookup154.site/cisco_anyconnect_vpn_windows_7hzgof.pdfIn PDF document text
    • https://cdn.sqhk.co/tedalome/0jfBX4M/msr_pocket_rocket_2_kit_review.pdfIn PDF document text
    • http://lakshmi-store.ru/artificer_crafting_guide6mhvd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371258/normal_600055baa0205.pdfIn PDF document text
    • http://medicalpracticementor.com/55066703989fiend.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482206/normal_5ffbaf24e896c.pdfIn PDF document text
    • http://securitycheckingbrowservkcom.xyz/anabolic_steroids_effects_on_sports_performancesu7pj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481285/normal_5fff187e3d94d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/bomifabipi/9387145288.pdfIn PDF document text
    • https://s3.amazonaws.com/zategafozasiru/best_online_android_course.pdfIn PDF document text
    • https://s3.amazonaws.com/boxalewijim/former_australian_test_cricket_captains.pdfIn PDF document text
    • https://s3.amazonaws.com/jazofi/chicago_format_book.pdfIn PDF document text
    • https://s3.amazonaws.com/vososasoxumete/hadrians_wall_walk_self_guided.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013062.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13062 5040 bytes
SHA-256: c7182b7cd7ba7e399d0d2b0951b79f74a54708a7d80783ef63be1a10b960edc3
font_01_sfnt_off00014188.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14188 10692 bytes
SHA-256: cdadef716eb7fb84afa03938616e1a5f1cfe8b93fd0a056a2c6f6c02214164e4