Malicious PDF — malware analysis report

Static analysis result for SHA-256 79b89c46c5c4ac85…

MALICIOUS

PDF

77.8 KB Created: 2021-01-29 00:46:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: a2d8234633e4c5101f1f863e10db7658 SHA-1: ea07fd7f0c2bae48a26029ae4b56fa4dc2fc376e SHA-256: 79b89c46c5c4ac85870ef13b9445e2c3bb1e41c29e91dc0509c3ceebc56b9f1c
194 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a link that redirects to a known malicious domain, identified by multiple heuristics as a redirector for phishing. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the embedded link is the primary indicator of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • 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.
  • 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/123?utm_term=que+es+un+verbo+intransitivo In PDF document text
    • http://ejqy.com/800_pounds_to_dollars_in_1940hy6ed.pdfIn PDF document text
    • http://shoop-fn.ru/practical_flow_cytometry_4th_editionghl3f.pdfIn PDF document text
    • http://morj.space/nozarusejexafomesajolukedm1feu.pdfIn PDF document text
    • http://loveantravel.xyz/pet_shop_story_game_download_for_pcz7zw4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501789/normal_5fe7a37a6f941.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495839/normal_5fca2e5cdff77.pdfIn PDF document text
    • http://shop-profildoors.ru/larupetemileui4dd.pdfIn PDF document text
    • http://exclusmxpn.com/86585958557mi067.pdfIn PDF document text
    • http://avtoshtorki.shop/347189286597rjb.pdfIn PDF document text
    • http://pufufabimego.iblogger.org/evil_morty_theme_piano_sheet.pdfIn PDF document text
    • http://thiswaytovogue.com/dragons_rise_of_berk_pcq7j5h.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/rodiligarexo/jabumuzajubojigibaka.pdfIn PDF document text
    • https://s3.amazonaws.com/lulelepese/star_sports_live_ipl_tv_app.pdfIn PDF document text
    • https://s3.amazonaws.com/kotodur/civil_case_information_san_bernardino.pdfIn PDF document text
    • http://kopuperoki.epizy.com/seagen_environmental_monitoring_programme_final_report.pdfIn PDF document text
    • https://s3.amazonaws.com/mejados/a_level_biology_revision_guide_online.pdfIn PDF document text
    • https://s3.amazonaws.com/lixisariwulo/bermuda_railway_trail_map_and_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/xuzed/5409398838.pdfIn PDF document text
    • http://mowelafawugek.epizy.com/98656135651.pdfIn PDF document text
    • https://s3.amazonaws.com/kaxukok/30907987031.pdfIn PDF document text
    • https://s3.amazonaws.com/gavobawum/jomesenitabovavawapuvewa.pdfIn PDF document text
    • http://vikomalagojuv.epizy.com/fagufatefidutelosoki.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_off0000dd4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD4F 6008 bytes
SHA-256: 58bdb7c40adcc5e32945dd8ff8e5675be16d9bde690e6eb144c6577a3c035761
font_01_sfnt_off0000f20d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF20D 4908 bytes
SHA-256: e8844fef01b72317978de1a68b19e6d830292c28a420c309b2e67bf2fa83e956
font_02_sfnt_off000102c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102C9 11340 bytes
SHA-256: 4de8a96742efaf6aa98b499713ac65a7f0dd27fdcbea6a8a6900d9b673db34e0

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