Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c1b9d00f5bf9da8…

MALICIOUS

PDF

76.2 KB Created: 2021-03-03 12:55:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 8cfa53f7baa31f9f4386ce3e6e8419cb SHA-1: 1c780c48a2306a280868db5518790ed7d5b9a9ae SHA-256: 9c1b9d00f5bf9da8bf03cd758ee768e065cf6b528643347998f6f7b0b6be1849
194 Risk Score

Malware Insights

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

The PDF contains a link that redirects to known malicious infrastructure, identified as a phishing lure for free downloads. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing campaign designed to redirect users to potentially harmful content.

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
  • 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://dafemum.ru/award?keyword=mosby%2527s+canadian+manual+of+diagnostic+and+laboratory+tests+2e+pdf In PDF document text
    • https://cdn.sqhk.co/voxedifi/LFjf5Mm/zuzijifak.pdfIn PDF document text
    • https://kesakoti.weebly.com/uploads/1/3/1/0/131070149/feresigiforuwumoroj.pdfIn PDF document text
    • http://leree4.club/jojegudupupakfaofk.pdfIn PDF document text
    • http://prognoz-football.club/1530804727369jj8.pdfIn PDF document text
    • https://cdn.sqhk.co/jigugabopu/GXAhdhc/grumpy_cat_memes_wednesday.pdfIn PDF document text
    • http://verefdliyvtorogo.xyz/xijagimevowusupamusighmol8.pdfIn PDF document text
    • http://saudiautoinsurance.com/sononodakixijovervzl25.pdfIn PDF document text
    • https://pulimogub.weebly.com/uploads/1/3/4/3/134312020/9a29dc015cdda40.pdfIn PDF document text
    • http://secret-empire.ru/14101114972u44in.pdfIn PDF document text
    • https://cdn.sqhk.co/vonirosidejo/XpgdYA8/sem_rocket_liner_mix_ratio.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/lixisariwulo/relojiju.pdfIn PDF document text
    • http://romipozaxijida.rf.gd/29238305797.pdfIn PDF document text
    • https://s3.amazonaws.com/senodiw/free_personal_finance_spreadsheet.pdfIn PDF document text
    • http://zarazemudaseri.epizy.com/battery_saver_samsung_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/wewuxuviwar/lazinafabanasovokixuw.pdfIn PDF document text
    • https://s3.amazonaws.com/zevutebulaworel/chogada_with_lyrics_hd_video_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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA36 5888 bytes
SHA-256: 7a363b31389ac78066a806925d2c580cf44b354819438f658103118c72509058
font_01_sfnt_off0000fe48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE48 10628 bytes
SHA-256: 4b6312cf86200713d89d0b664254a9999b3c6df6be8961384efbf87c73f25384

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