Malicious PDF — malware analysis report

Static analysis result for SHA-256 864bd3f8308578fc…

MALICIOUS

PDF

70.7 KB Created: 2021-03-28 01:13:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: b03ef4cf9b244fdc812bf865678652b6 SHA-1: 985fc0438c709cf300b230e72f62b4addbde04cb SHA-256: 864bd3f8308578fc7c12795cd0d3ba1e4ea889f554450f319339a4ec17004aa2
66 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains embedded URLs that point to potentially malicious domains, including one that appears to be a link farm. The ML classifier strongly indicates maliciousness. While no scripts were explicitly extracted, the presence of embedded URIs and the heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggest an attempt to redirect users to harmful content, likely as part of a phishing or scam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://seumenha.ru/wix?keyword=unlisted+watches+instructions PDF link annotation
    • http://vidapabil.22web.org/77226644655.pdfIn PDF document text
    • https://resodarapasak.weebly.com/uploads/1/3/4/6/134659305/85995af53511.pdfIn PDF document text
    • https://felinabaf.weebly.com/uploads/1/3/4/3/134380667/modanu-kider-duras.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/291119ec-0ceb-43f1-9943-8729be7aa4d2/reggae_drum_patterns.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3062dd6a-f8b1-4975-b89d-f1c01db0c9fc/64797836762.pdfIn PDF document text
    • https://s3.amazonaws.com/tetofamuxulil/sinagixodijuwuxoloj.pdfIn PDF document text
    • https://b1e6e3cd-24a2-426a-8b7d-e8f4bd81915b.filesusr.com/ugd/83e584_fe3e691756b64fe2a9485089218ac116.pdf?index=trueIn PDF document text
    • http://komoxam.rf.gd/26154141171.pdfIn PDF document text
    • https://781b76d0-895c-4d4e-90f3-491762fad171.filesusr.com/ugd/894952_c0fc4348569348faba4c1604c2408f1f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/018f226c-1ddb-4db3-8979-71bee646f39b/fowadiwimanazijamojo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/07fbe937-d977-4c7d-9dd5-7a6212360db3/rejefegusevofunijo.pdfIn PDF document text
    • https://s3.amazonaws.com/divexikav/34265984162.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb3076ae-4cd8-4946-b523-5236d254e677/tuesdays_with_morrie_movie_actors.pdfIn PDF document text
    • https://s3.amazonaws.com/fajetufekejo/jolavofelogozo.pdfIn PDF document text
    • http://xigonix.rf.gd/7804903838.pdfIn PDF document text
    • https://f270a619-8d23-4dc9-95fa-a4320df4b75e.filesusr.com/ugd/7bd364_d33dbe6d4eac47f9a37d30b5ce8d6c3b.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/31b1d058-2ffb-433e-b9c4-05cb1212e831/xefuxijabawosima.pdfIn PDF document text
    • http://bemurulorax.rf.gd/seismic_reflection_survey.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a21abc4-f777-44ac-856a-674418ca6186/how_to_calculate_the_bond_order_of_nitrogen.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cc84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC84 2900 bytes
SHA-256: b3dfb2f2c41da7350fc3755141d2fd0ea5796bb125df25fec831093623ff73df
font_01_sfnt_off0000d6c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6C7 5112 bytes
SHA-256: 1217609fb430701d01a606913beb8954b50ad1c3858a7b4da97a9c2f95b324b9
font_02_sfnt_off0000e837.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE837 10960 bytes
SHA-256: 96787f9d6352880100a370fce4334ac70e6b402ed365b1f7b4d304be86912c95

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