Malicious PDF — malware analysis report

Static analysis result for SHA-256 30527c58c04266fc…

MALICIOUS

PDF

76.7 KB Created: 2021-02-20 05:45:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: a20e12cf6491526dd23eed6a944e5465 SHA-1: 483f3e1ae31251eb8c6ba0bae6f3f08543609a35 SHA-256: 30527c58c04266fc37e2ccc2fc5a89b1feb0bf0b61c987a737064ffe74a423f8
196 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan distribution attempt. It contains a large number of external links, many of which are SEO-redirectors, suggesting an attempt to drive traffic to malicious sites. The embedded URLs and the PDF structure point towards a tactic of creating link farms or phishing lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://jacksth.ru/strik?utm_term=how+long+is+a+medical+assistant+certificate+good+for PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4417128/normal_5fd036fddbb4e.pdfIn PDF document text
    • https://pepomujotopulog.weebly.com/uploads/1/3/4/8/134873529/8330375.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416322/normal_60176380a0bc9.pdfIn PDF document text
    • https://cdn.sqhk.co/modajili/Rihhjj8/msx2_emulator_android.pdfIn PDF document text
    • https://cdn.sqhk.co/mogezunir/hiWnThe/three_kingdoms_online_watch.pdfIn PDF document text
    • https://cdn.sqhk.co/soxuvezosapa/zjejjaw/jopemoxipozalawoma.pdfIn PDF document text
    • https://cdn.sqhk.co/dukosisevu/2eibiif/whale_sharks_eating_humans.pdfIn PDF document text
    • http://becloud.website/34112987972e23od.pdfIn PDF document text
    • https://volufijipezuji.weebly.com/uploads/1/3/4/7/134703795/7592931.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416802/normal_5fca4d35ba1b4.pdfIn PDF document text
    • https://zasevolonuto.weebly.com/uploads/1/3/5/3/135335071/zifin.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/foneniz/best_archiver_app_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/sowirutelevolur/14212098784.pdfIn PDF document text
    • https://s3.amazonaws.com/mujesogi/bp_job_interview_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/jebupofedijakuk/56265410363.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_off0000e183.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE183 5184 bytes
SHA-256: 83bebb11bafc15b652d82eaedfdd1fb918f2f8dde57eab74a4699de78564e839
font_01_sfnt_off0000f316.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF316 10508 bytes
SHA-256: 2645a24bf6731f2e8bbe2a9f7ba2cf9a43fc22919c7941a640ad8e0d8550d69d
font_02_sfnt_off000116fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116FA 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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