Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b41ea1c5cb4a214…

MALICIOUS

PDF

98.2 KB Created: 2021-02-24 16:14:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 809448a5a17d46a1997be0bc7764e330 SHA-1: b92cdf53795a19b15bbc4fcf8517b862474a1af6 SHA-256: 3b41ea1c5cb4a21414ca32362834712924e9b711deca0a63c4233d8c87b60d93
194 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which are part of an SEO link farm designed to redirect users to potentially malicious content. The heuristic 'PDF_SEO_LINK_FARM' and 'PDF_SEO_UTM_REDIRECTOR_LINK' indicate a phishing or malware distribution scheme. The ClamAV detection further supports the malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7879

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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
  • 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://bologen.ru/award?keyword=what+is+the+meaning+of+a+man-at-arms PDF link annotation
    • https://s3.amazonaws.com/wixamupelinere/vocal_remover_apk_full.pdfIn PDF document text
    • https://s3.amazonaws.com/tedowafomaru/avantage_concurrentiel.pdfIn PDF document text
    • https://s3.amazonaws.com/pusori/you_are_old_father_william_answers.pdfIn PDF document text
    • https://fuvapevamasazu.weebly.com/uploads/1/3/4/5/134507747/fcd52b54b2.pdfIn PDF document text
    • https://s3.amazonaws.com/mibiwivanetuj/ad_hoc_wireless_networks_textbook.pdfIn PDF document text
    • http://love-cosmetics.shop/7787254671976aqt.pdfIn PDF document text
    • http://semengergel.ru/zezelokito8v0et.pdfIn PDF document text
    • https://sajofagexureleb.weebly.com/uploads/1/3/4/6/134652103/fewaxafo-jagigifajinis.pdfIn PDF document text
    • http://grusha.space/section_5_firearms_act_1968_sentencing_guidelinescua7f.pdfIn PDF document text
    • https://cdn.sqhk.co/zururodi/hcEib5c/63988787677.pdfIn PDF document text
    • https://s3.amazonaws.com/tugafebip/bolt_report_alex_malley.pdfIn PDF document text
    • https://cdn.sqhk.co/basinasedu/HR5jjyM/globe_load_top_up_mobile_legends.pdfIn PDF document text
    • http://cancandance.org/dogfight_2_hacked_unlimited_health_unblockedvrmvb.pdfIn PDF document text
    • https://mefupajudeto.weebly.com/uploads/1/3/4/8/134883840/wokug.pdfIn PDF document text
    • https://cdn.sqhk.co/numiwuzuwix/gjahgjc/65827713221.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012173.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12173 5588 bytes
SHA-256: 40ed7a59e93a39a2357a6714e82246a7d8382393c541a7d084f33d2bd6126fa4
font_01_sfnt_off00013503.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13503 5196 bytes
SHA-256: 326cfdead8d000cb2cb8f27749aec9835bbfc40f63d4ca57c26c6f7b6d370a35
font_02_sfnt_off00014695.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14695 2656 bytes
SHA-256: c206ac4eca120f096112d408dff6b33a2f721090936d80486df636e1cd240fde
font_03_sfnt_off0001519b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1519B 2328 bytes
SHA-256: 3702365b3034b9d7945da23b991b5e2ac3f8bb06d1ba3be7e5ba1b5d8dd48c9f
font_04_sfnt_off00015c52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15C52 2108 bytes
SHA-256: e66bd646ff29f48b94a898642357a1d5295b77faffa0bd70eb77acb4aebc9a97
font_05_sfnt_off0001661e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1661E 6640 bytes
SHA-256: eca62b72654736461a635ba366d09d794777fd95c58152d2b251becdfce657e0

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