Malicious PDF — malware analysis report

Static analysis result for SHA-256 52fcb75428615d9f…

MALICIOUS

PDF

96.8 KB Created: 2021-03-04 12:41:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 6a18374e9f0ddcb340a5a36f067bb175 SHA-1: 1184c1080c1aa3dde31b7d6c2e4392e26d9e37aa SHA-256: 52fcb75428615d9f99c3d7cc5775a2170c08df51ac9a8b5ac858f91ffd1af816
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://resalured.ru/wix?keyword=2016+louisville+slugger+prime+916 PDF link annotation
    • https://mazerobuwi.weebly.com/uploads/1/3/1/3/131398334/kutuluwarefij-jaridosade-kufowapaz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452385/normal_5fe20cabf4045.pdfIn PDF document text
    • https://rawogozanukej.weebly.com/uploads/1/3/4/6/134623914/6507831.pdfIn PDF document text
    • http://pejokepi.mywebcommunity.org/waterpik_cordless_ultra_plus_water_flosser_wp-450e_-_blue_white.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404745/normal_603be2bfeb68a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404122/normal_5fde9e0d6c4a6.pdfIn PDF document text
    • https://bupogoduvokog.weebly.com/uploads/1/3/4/6/134690502/1499837.pdfIn PDF document text
    • https://roloruvibufezer.weebly.com/uploads/1/3/1/4/131410818/5b436fee9d8c443.pdfIn PDF document text
    • https://moxitimufetumo.weebly.com/uploads/1/3/4/0/134040580/7138964.pdfIn PDF document text
    • https://rixifumalig.weebly.com/uploads/1/3/1/4/131437092/mijure-maxopetikoxex-mapeja.pdfIn PDF document text
    • https://numeroluxovuz.weebly.com/uploads/1/3/4/7/134733954/3829877.pdfIn PDF document text
    • http://rastet-malysh.ru/ultimate_lion_simulator_apk_27a6vd.pdfIn PDF document text
    • https://rakafofolobe.weebly.com/uploads/1/3/4/6/134649319/vuvikotofazup.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fuxunowelujuxa.atwebpages.com/zipol.pdfIn PDF document text
    • http://jisijuvod.myartsonline.com/old_school_bagel_tulsa_order_online.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_off00013f55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F55 5528 bytes
SHA-256: d12570fcb25ae7f5493fa7f37f9ce180052a877cb225e00d3dabc3cf46a3497d
font_01_sfnt_off00015217.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15217 10652 bytes
SHA-256: 76933fae31acf6607b5a14a6af0fb44a7a109ed45e8f2f1d8c0405bc4e57766d

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