Malicious PDF — malware analysis report

Static analysis result for SHA-256 c739b12e9a29148f…

MALICIOUS

PDF

73.9 KB Created: 2021-04-05 11:41:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: d3d8eac1774300ae6f16c75edfc10b21 SHA-1: ae7fcf2e98a94f314bdc5c54bb4627da1cf9b955 SHA-256: c739b12e9a29148f7ecba982f77cc58ecdf2f865a85fe3ea6531c6ef0219d5d1
194 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, and contains a link to known malicious redirector infrastructure. The link, disguised with a lure about the Canada food guide, points to 'https://dafemum.ru/123?utm_term=canada+food+guide+grains+serving+size'. The primary purpose appears to be phishing or redirecting users to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://dafemum.ru/123?utm_term=canada+food+guide+grains+serving+size In PDF document text
    • https://cdn-cms.f-static.net/uploads/4462374/normal_60257cc6b23f5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477873/normal_5fd3aacb7b69b.pdfIn PDF document text
    • http://power-guard.shop/366007268533ajmf.pdfIn PDF document text
    • https://s3.amazonaws.com/robumuduluwise/23888027755.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380523/normal_6069e3dbed08c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409107/normal_600ba8597c777.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370762/normal_60571a0adeaec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370746/normal_605ba492815e8.pdfIn PDF document text
    • https://s3.amazonaws.com/wejuvono/asics_women_s_clothing_size_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/saxefi/55917158178.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402504/normal_6045153ad1788.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392649/normal_5fcc0d269bbff.pdfIn PDF document text
    • http://opensalon.xyz/alison_bechdel_dykes_to_watch_out_for_bechdel_test8dunm.pdfIn PDF document text
    • https://s3.amazonaws.com/tezude/ejercicios_de_escritura_tercer_grado_primaria.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419818/normal_6018bac3c1718.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473651/normal_605978f8392af.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453134/normal_5fcd29cf65adf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000e419.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE419 5056 bytes
SHA-256: 46fb500f4e39cc60ca9f5586a646b92a92f456cecbcbbe9e74a963283cce3ee4
font_01_sfnt_off0000f56e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF56E 10712 bytes
SHA-256: e5e807f711569280570807be273e6721dd4cf3466834e8e4ba66141d98105366

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