Malicious PDF — malware analysis report

Static analysis result for SHA-256 8cd4d515362e7f0c…

MALICIOUS

PDF

330.7 KB Created: 2021-03-22 22:29:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 2ea3d67a1230902baf7a57f3126510a1 SHA-1: 2fde3d4d7ae61a4e9c7b75dde9fddb60d8869b65 SHA-256: 8cd4d515362e7f0cab2743b2489c9e9e4bd1034f995d890f07e1a91b5a0967d6
136 Risk Score

Malware Insights

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

The PDF contains a heuristic indicating it's a lure for free downloads, pointing to a redirector URL. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing. No scripts were extracted, but the presence of embedded URLs and the nature of the heuristics point towards a phishing attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9838

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
  • 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://mezovuduw.ru/wix?keyword=sea+of+monsters+pdf+online PDF link annotation
    • http://excschool.ru/sistema_muscular_humano_completozx5p5.pdfIn PDF document text
    • http://myfoxing.online/sirusubegenazowerirlk0h9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375088/normal_60078a97a83eb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403823/normal_5fef45cdac4e9.pdfIn PDF document text
    • http://wobokegidutijem.iblogger.org/what_two_countries_border_north_korea.pdfIn PDF document text
    • http://wusodopepufex.66ghz.com/fetimaxoxawarevajaz.pdfIn PDF document text
    • http://kipededevidabun.iblogger.org/can_i_use_5w30_oil_in_my_snowblower.pdfIn PDF document text
    • https://s3.amazonaws.com/julaxel/gakovotisizelepusemi.pdfIn PDF document text
    • http://konujojijitezu.iblogger.org/runisibotupamabulever.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416653/normal_60555c00301a3.pdfIn PDF document text
    • https://s3.amazonaws.com/kudufigunabi/micro_center_return_policy_restocking_fee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446790/normal_60588522b2418.pdfIn PDF document text
    • http://spainsale.pro/meaning_of_visual_culturesrjgx.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450636/normal_5ff06c0413353.pdfIn PDF document text
    • https://s3.amazonaws.com/xeponodij/foreign_body_aspiration_pediatrics_guideline.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://be9c8297-50e9-4ec8-be22-7cc4068ef96a.filesusr.com/ugd/fc3b0b_aec9e37d602d420fad3e80e40c6185f9.pdf?index=trueIn PDF document text
    • http://wukerakowevomu.epizy.com/clash_of_clans_private_server_pc.pdfIn PDF document text
    • https://97d49ff2-d914-4ae4-8ac8-5e5cf5f77cad.filesusr.com/ugd/6350c7_c4a7192704d14ab0b32127cf6c4cca6e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac593f38-15ba-4613-a2e9-59a39ab77c3e/towugotemefuwu.pdfIn PDF document text
    • https://c580675e-8888-491d-8c80-3106eaac86fb.filesusr.com/ugd/c8a981_cebffe7179764c22b6b73fe74dcf1e57.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e883abf3-a4d8-4f71-a9da-6424dc60c615/diana_gabaldon_outlander_quotes.pdfIn PDF document text
    • https://c216880a-03a2-4774-ab7e-121c93799e8f.filesusr.com/ugd/b5aed9_32f6151c24684b1c9388543fdbda42ad.pdf?index=trueIn PDF document text
    • https://19aaccd0-9772-41b6-85c4-be118606641a.filesusr.com/ugd/a12125_58f769c88ce540d190e4429014713bcf.pdf?index=trueIn 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_off0004e1e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4E1E9 5292 bytes
SHA-256: 58b9903756e26d48d0c981b4b9d6e18f3849b341afe1b0057cbd9e4e58449cfe
font_01_sfnt_off0004f3d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4F3D5 12176 bytes
SHA-256: d5953013ef4db794397048bdd935a5a5ec849eeaa15ad9ea57e3f1ac615f4255