Malicious PDF — malware analysis report

Static analysis result for SHA-256 74b382852eb483c1…

MALICIOUS

PDF

76.0 KB Created: 2021-03-15 08:14:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 7eb47f83ca6dc0c7d95a783b4277ba73 SHA-1: 6ecbfcf32c59df1a961e6a8a8c4b78f16ab4f8d9 SHA-256: 74b382852eb483c1cb13ae7a362713ab2d2b95e1fc75ac02a118889be60806a8
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The presence of external URIs and a specific heuristic for SEO redirectors indicates a phishing lure, likely designed to trick users into downloading further malware or submitting credentials. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/award?keyword=brrrr+book+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4482012/normal_5ffcad2cea440.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403274/normal_6010881c7cca2.pdfIn PDF document text
    • http://jugixemetofun.22web.org/kenupegirolarokimuforisa.pdfIn PDF document text
    • http://shtangye.xyz/robezunotagewazoguinyt2.pdfIn PDF document text
    • https://fiwimojulo.weebly.com/uploads/1/3/4/5/134525916/sofizovemixas_watumajulinir.pdfIn PDF document text
    • https://zeloseko.weebly.com/uploads/1/3/1/1/131163733/4706820.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456666/normal_60265adfbc10d.pdfIn PDF document text
    • https://cdn.sqhk.co/ferudati/0tpEMSo/30180558266.pdfIn PDF document text
    • https://cdn.sqhk.co/kufiremikaf/idugjzf/63567429291.pdfIn PDF document text
    • http://bavedibigilomit.66ghz.com/aines_dosis.pdfIn PDF document text
    • http://litvinenko.xyz/ohio_common_core_standards_math_8th_grade_129bgy.pdfIn PDF document text
    • https://womegirig.weebly.com/uploads/1/3/4/5/134506381/mabuworeruv.pdfIn PDF document text
    • https://cdn.sqhk.co/kuderoxuz/XyRigja/21047320814.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zijivevip/47154593287.pdfIn PDF document text
    • https://s3.amazonaws.com/nazekisigiduz/20281026850.pdfIn PDF document text
    • https://s3.amazonaws.com/xokebore/kukoni.pdfIn PDF document text
    • https://s3.amazonaws.com/wazotojemov/able_systems_ap1310_manual.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_off0000eb9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB9A 4868 bytes
SHA-256: b5a19009879c59e0ed359d04b59728bb3b8a23f25680534514e35c931ccc7ec5
font_01_sfnt_off0000fc3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC3C 11696 bytes
SHA-256: 532caf9857210e69294b39074c50093ffb591dbdf6e51140b0a8e1cb788909fd

Open this report in the interactive analyzer, or submit your own file for analysis.