Malicious PDF — malware analysis report

Static analysis result for SHA-256 e77c40ab2a91280b…

MALICIOUS

PDF

71.7 KB Created: 2021-02-11 16:48:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: e61e5c437d2cc6e9073c702d5f4e2c64 SHA-1: 57d895573f22ba92212da92a861425236c5a6922 SHA-256: e77c40ab2a91280be544e61a6f39c9b8230db63c6afa9a5f7dc73ae8399dc16a
256 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://parafobosa.weebly.com/uploads/1/3/1/8/131857791/lonawizo.pdf.
  • 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=lords+mobile+cheats+and+hacks PDF link annotation
    • https://parafobosa.weebly.com/uploads/1/3/1/8/131857791/lonawizo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414360/normal_60006cd1654b6.pdfIn PDF document text
    • https://gavanigo.weebly.com/uploads/1/3/1/3/131380609/bf34afb148e4.pdfIn PDF document text
    • https://wibugosavuzatug.weebly.com/uploads/1/3/4/3/134349607/7553943.pdfIn PDF document text
    • https://banafazag.weebly.com/uploads/1/3/4/3/134325205/4882780.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452837/normal_5fe06a14ef94b.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/dowadotiju/kidisifudogozezumowijowoj.pdfIn PDF document text
    • https://s3.amazonaws.com/xaliwalufoguni/30072830085.pdfIn PDF document text
    • https://s3.amazonaws.com/tosego/76926904495.pdfIn PDF document text
    • https://s3.amazonaws.com/guwutivupudutu/ring_size_measurement_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/zuguvoxoki/sheet_metal_forming_nptel.pdfIn PDF document text
    • https://s3.amazonaws.com/lanorolowu/jaguar_i_pace_review_consumer_reports.pdfIn PDF document text
    • https://s3.amazonaws.com/zafijukopa/va_adverse_drug_event_reporting_system.pdfIn PDF document text
    • https://s3.amazonaws.com/lurutopobi/tcode_for_ageing_report_in_sap.pdfIn PDF document text
    • https://s3.amazonaws.com/sojuravewi/grade_10_filipino_module_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/minegikukovel/49194937152.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_off0000dceb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCEB 5324 bytes
SHA-256: e3701d90120139d6f3bfc096c2639667f2dfb752393a85baa81720be0b275c16
font_01_sfnt_off0000eed6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEED6 10112 bytes
SHA-256: ddccf7c29c15cac9a9e8770282e296d2775c732f2f8bc0376c75f018071d4992

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