Malicious PDF — malware analysis report

Static analysis result for SHA-256 d54c25edd663d8ea…

MALICIOUS

PDF

74.4 KB Created: 2021-02-21 13:49:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: e6690a3e4ccf58e69ce6386c8d648e4d SHA-1: 73dd7db5ac38b0103a9734b17210ab3caae417db SHA-256: d54c25edd663d8ea9431d679e64ec46cefbf775ec3db4a60ead1d8f761638c2f
144 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains multiple suspicious links, including one to 'com-login8.xyz' which is flagged as a lure for phishing or malware. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of embedded URLs and the 'SE_DOWNLOAD_BUTTON' heuristic suggest the document is designed to trick users into downloading a payload or visiting a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Image-heavy PDF with invisible link to suspicious domain high PDF_SUSPICIOUS_LINK_LURE
    PDF is a small image-heavy lure with invisible link annotations that send the user to a suspicious high-risk-domain URI. This matches credential-phishing carriers where the visible document is only a prompt and the real collection flow happens on the linked website.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://baarspo.ru/wix?keyword=rusty+lake+paradise+apk PDF link annotation
    • http://mstmail.space/nursing_documentation_examplesnsssi.pdfIn PDF document text
    • http://oneitshop.info/infant_pounds_to_grams_conversion_chartsx760.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405197/normal_5fe4aaae26c8d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496605/normal_5ff7c4e732ec7.pdfIn PDF document text
    • http://zakukamupavi.22web.org/html5_email_template_builder.pdfIn PDF document text
    • http://nagetav.22web.org/39137459595.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496165/normal_5ffe4fa760e01.pdfIn PDF document text
    • https://cdn.sqhk.co/sepufaziru/WjaaVie/11751689238.pdfIn PDF document text
    • http://sevelorovuwo.66ghz.com/74938848253.pdfIn PDF document text
    • http://com-login8.xyz/36295223105mhchp.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447267/normal_5ff0421f0c82d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dakozel.epizy.com/business_intelligence_and_data_science.pdfIn PDF document text
    • http://bapexuzajo.epizy.com/latakipikobeputopadu.pdfIn PDF document text
    • https://s3.amazonaws.com/nabifovu/aashiqana_aalam_hai_song.pdfIn PDF document text
    • http://bekelogamaju.rf.gd/33210931491.pdfIn PDF document text
    • https://s3.amazonaws.com/sobaketemu/pc_game_god_of_war_4.pdfIn PDF document text
    • https://s3.amazonaws.com/nodetuxapabara/2ctv_cracked_apk.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_off0000e830.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE830 5128 bytes
SHA-256: 74646cbd58faf8905868905a17c214ca6b2c19b1713bbd9202616a8211384de3
font_01_sfnt_off0000f9bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9BF 10172 bytes
SHA-256: 0adf0b1ac374745ba5a15e13e99fbb891b1ef3c339d4bcc7176464c992da5e1e

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