Malicious PDF — malware analysis report

Static analysis result for SHA-256 a81f593b0adafae2…

MALICIOUS

PDF

69.5 KB Created: 2021-02-21 07:40:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 84859c07b1e38a2d7e54521a1d1ae6f8 SHA-1: 3ae5358f81ba086bc8f020b9f19299af06a0d3ff SHA-256: a81f593b0adafae29ca68f162e344f908efab3fb89181b68a8458fedd18472a6
136 Risk Score

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://jottigo.ru/wix?keyword=new+manchester+middle+school+chesterfield+va PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4406481/normal_60312d31d7dad.pdfIn PDF document text
    • http://converstarget.ru/limitogevugikegipipaxudes4m0mg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408989/normal_602d9c125cb07.pdfIn PDF document text
    • http://lastmarkt.ru/jspdf_autotable_table_width3gj1n.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449630/normal_5ff82a9d9ac28.pdfIn PDF document text
    • http://form-lnstagramcopyrightservices.com/brand_design_ruud_boer6j8z7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450513/normal_5fc8a8173332c.pdfIn PDF document text
    • http://prizinsta.online/fire_alarm_sounds_twice_then_stopsbztum.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480579/normal_5fe27676a085d.pdfIn PDF document text
    • http://card2card.live/nabasifivasiwiluxisonagtkydd.pdfIn PDF document text
    • http://sungo1.space/wotamadipazog10myn.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414501/normal_5fec91ca0f6c7.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/vufupu/centrelink_forms_of_identity.pdfIn PDF document text
    • https://s3.amazonaws.com/zepifudoxapo/88701376598.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxulikiwab/camera_raw_8._7_mac.pdfIn PDF document text
    • https://s3.amazonaws.com/gavapozalilup/joint_commission_report_a_complaint.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_off0000d191.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD191 5380 bytes
SHA-256: 727a7713bd6db432af5d2eb14c3df4e6342d5e70dc894ecf8ab18dfe265bc8ec
font_01_sfnt_off0000e3cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3CD 10856 bytes
SHA-256: a19ae912f5cc35decc7193e9ab5cbe00af10d25fb68065b799878df05788f9c3