Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc8d7adf68ee3f59…

MALICIOUS

PDF

76.6 KB Created: 2021-05-25 02:08:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 131d0a698cc558522c30b065233e3872 SHA-1: 2d4f36615338f1783f117e9209cf82bc8e1ef3cb SHA-256: cc8d7adf68ee3f59d1122923088bf4b4b4c1784803cb433effd02af1f25c6111
286 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1534 Credentials from Password Stores T1059.007 JavaScript

This PDF document is identified as a credential phishing lure, specifically impersonating Wells Fargo to harvest user credentials. It employs a link farm strategy, directing users to various external sites, one of which is a known redirector for phishing content. The document's structure and heuristic firings strongly indicate a malicious intent to deceive users into providing sensitive information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 8

  • 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://fiwaluveniwob.weebly.com/uploads/1/3/5/3/135395264/2529666.pdf.
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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.
  • 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://gimoguvi.ru/strik?utm_term=how+to+check+visa+medical+report+online+abu+dhabi PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4470035/normal_600a3b360da74.pdfIn PDF document text
    • https://fiwaluveniwob.weebly.com/uploads/1/3/5/3/135395264/2529666.pdfIn PDF document text
    • https://befadileniralan.weebly.com/uploads/1/3/6/0/136082268/widazapevakekupof.pdfIn PDF document text
    • https://netexebi.weebly.com/uploads/1/3/0/8/130815192/8586051.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427501/normal_6066ca6ba64ec.pdfIn PDF document text
    • https://kofuwirobunugob.weebly.com/uploads/1/3/4/3/134318534/fa1587c02d7915a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408170/normal_602772fab1c36.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367920/normal_606e837b0ee58.pdfIn PDF document text
    • https://kawuzuvom.weebly.com/uploads/1/3/1/3/131379118/8986136.pdfIn PDF document text
    • https://vipagavufedolaz.weebly.com/uploads/1/3/5/3/135350232/26d80eaf5.pdfIn PDF document text
    • https://retumitoratosu.weebly.com/uploads/1/3/4/2/134234586/mazime.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413843/normal_5ff3ace76d7b0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458132/normal_601e1a023fe9b.pdfIn PDF document text
    • https://sudewivozuv.weebly.com/uploads/1/3/2/3/132303071/3074966.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/06b5ec88-316a-42f7-bfcd-5dae51a58501/.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c4d38d5-780c-463d-b542-5bddd9e05d23/73077763432.pdfIn PDF document text
    • https://s3.amazonaws.com/donukadizolin/zajekud.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a4a3d74-3a29-4a9c-9cea-6a7ac1f0cd6c/49328125444.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf639d79-f96d-4fa9-96ab-570c614705cf/simple_present_tense_exercises_worksheets_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/kodipopujufipig/522053743.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_off0000ee0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE0B 5628 bytes
SHA-256: 40bb49ed94e75933366731d6390441211b390622a9b1c15252d135874a6160fe
font_01_sfnt_off0001010d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1010D 10372 bytes
SHA-256: c52845008eac3c745a928bbf60d80dc9fcb3ac219b5b433634c6632e61b54c93

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