Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a1b004306a33138…

MALICIOUS

PDF

78.5 KB Created: 2021-02-28 08:43:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: d243b7655bedd912298a5dd0f4a9f7db SHA-1: 3c4b2cb61f316af88ab01a7217c5a6a21024b177 SHA-256: 2a1b004306a33138ea979957831521abb92e9e87533bf7cfcd9002c95da3c096
194 Risk Score

Malware Insights

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

The PDF contains numerous links designed to appear as a schedule, but analysis indicates these are part of an SEO link farm leading to malicious redirectors. The primary malicious URL identified is https://dafemum.ru/wix?keyword=capitals+schedule+february+2020, which is flagged as a known malicious redirector. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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.
  • 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/wix?keyword=capitals+schedule+february+2020 In PDF document text
    • http://ericksandoval.com/action_for_2-_4_players_pro_mod_apkeoxbt.pdfIn PDF document text
    • https://s3.amazonaws.com/kikunojulejuj/aaron_ramsey_juventus_performance.pdfIn PDF document text
    • https://s3.amazonaws.com/welanisowari/61676837692.pdfIn PDF document text
    • https://kapejipe.weebly.com/uploads/1/3/1/0/131070538/2c7428452bb.pdfIn PDF document text
    • https://s3.amazonaws.com/moduxanakuri/zofekesegofubutefe.pdfIn PDF document text
    • https://zedabobosarafon.weebly.com/uploads/1/3/0/8/130813357/tabamised_rofexikijulamo_bitupivafuv.pdfIn PDF document text
    • https://xewaxamuroz.weebly.com/uploads/1/3/4/5/134529724/naromogowadogu.pdfIn PDF document text
    • https://s3.amazonaws.com/tixeligufokup/ayo_and_teo_rolex_dance.pdfIn PDF document text
    • http://kagivumuro.iblogger.org/tozemadaludaxizixakamin.pdfIn PDF document text
    • https://xubivolimoba.weebly.com/uploads/1/3/0/7/130740090/46c32.pdfIn PDF document text
    • https://zorusijumabek.weebly.com/uploads/1/3/4/8/134851431/wesapenurajinubusi.pdfIn PDF document text
    • http://pusewuvi.medianewsonline.com/xekezezaz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dexifuv.epizy.com/11327869149.pdfIn PDF document text
    • http://ninukak.epizy.com/casualty_tv_show_episode_guide.pdfIn PDF document text
    • http://zudupaxub.myartsonline.com/fishing_rod_setup_for_catfish.pdfIn PDF document text
    • http://bezepegu.epizy.com/98644148734.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

Related samples 7

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e31d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE31D 5664 bytes
SHA-256: f602dbfd7b9336458b19ba74d44d0a1d764b3e5abe937269193c0614b99a2235
font_01_sfnt_off0000f653.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF653 1912 bytes
SHA-256: 219c50eb5f9de54547e75882c5791e81fccadeb83f743dbd1d6da3bbbca1c2be
font_02_sfnt_off0000ff94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF94 14168 bytes
SHA-256: 2e89428d3d1da036cdaada255401dd70302dce499af6041fccf7362851a3d11e

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