Malicious PDF — malware analysis report

Static analysis result for SHA-256 228dcb72c406cf65…

MALICIOUS

PDF

42.4 KB Created: 2020-11-05 20:30:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 3350c4a69fe1455532a369693a7b8198 SHA-1: 919749f34bb82c102769d32e00cb9b8a9c0a2543 SHA-256: 228dcb72c406cf65e9fd7f1c0b1f65af0dfe4940031a58feb25c4b4220d45e75
76 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document contains embedded URLs and a heuristic firing for an SEO redirector, indicating a phishing or malware distribution attempt. The document body text, though partially garbled, includes keywords related to 'icivics worksheet answers' and the malicious URL, suggesting a lure to entice users. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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
  • 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://trafficel.ru/123?keyword=icivics+worksheet+answers+a+very+big+branch PDF link annotation
    • https://nitiruminaxodax.weebly.com/uploads/1/3/0/7/130738633/vejufon.pdfIn PDF document text
    • https://jusujonolixutuw.weebly.com/uploads/1/3/1/3/131379247/sotubatuje-lesade-jowanilovivarag-tubepavarodoror.pdfIn PDF document text
    • https://rulomegujenuguv.weebly.com/uploads/1/3/4/3/134329868/jezaxu_kanidavakop_vukorowupenefo.pdfIn PDF document text
    • https://babikovinemixe.weebly.com/uploads/1/3/1/8/131856339/fivodufiroxafufug.pdfIn PDF document text
    • https://samomalekadoj.weebly.com/uploads/1/3/1/4/131438786/wenebumafepa_jefop_lefatijozeti.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e68cbcb-cf8b-49aa-85e1-37c185cb9b59/cheat_codes_for_grand_theft_auto_liberty_city_xbox_360_jetpack.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fedb4720-5d39-472f-8edc-f73d96b3f1ee/la_ley_del_deseo_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16de4446-d0e6-48ac-b609-c8366fc0e7a1/zugesadomufutod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3deb3561-f0a9-4b1e-ab6a-3388c84ab85a/earth_user_s_guide_to_permaculture.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68988746-f018-4ca7-9a56-596b1022ad88/25715417770.pdfIn PDF document text
    • https://s3.amazonaws.com/sinamozagemoger/89680650340.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_off00006822.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6822 5424 bytes
SHA-256: 9279343db4d39d8928b5951e4548ec8f83463602e14b046d6a5a02938853d25b
font_01_sfnt_off00007ab2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7AB2 10024 bytes
SHA-256: bbdd1fd55a84a046905d8874a40299922725db512c0df68bf70f306694325028

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