Malicious PDF — malware analysis report

Static analysis result for SHA-256 d825ee99716deed0…

MALICIOUS

PDF

74.6 KB Created: 2021-03-04 17:54:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: b96c9cb952e100a77cf36c699334d0b4 SHA-1: e3572913dc1aa66610124ba44c9f95855f877e41 SHA-256: d825ee99716deed0acd6e3d11704b3022476300ff78f69fd67b13dd6b7b23247
216 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics as malicious, including a critical finding for brand-impersonation credential phishing targeting Apple. The ML classifier also returned a high confidence score for maliciousness. The document contains numerous external links, suggesting it's part of a link farm or phishing campaign designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • 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.
  • 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://zarojapejafaro.weebly.com/uploads/1/3/5/3/135347044/totejapu_wemiberu_batunuzif.pdf.
  • 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://leonvi.ru/award?keyword=what+happens+to+eights+in+the+giver+chapter+4 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4416921/normal_6011e03a617a2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372967/normal_602a18a443ced.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383918/normal_5feef76a19240.pdfIn PDF document text
    • https://zarojapejafaro.weebly.com/uploads/1/3/5/3/135347044/totejapu_wemiberu_batunuzif.pdfIn PDF document text
    • https://dugaposiga.weebly.com/uploads/1/3/4/8/134857723/916134.pdfIn PDF document text
    • https://fanamiwa.weebly.com/uploads/1/3/4/0/134013174/jisebadubupozusilo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370092/normal_60387284291b3.pdfIn PDF document text
    • https://cdn.sqhk.co/mekurapiw/hiegjDg/matinipojoze.pdfIn PDF document text
    • https://cdn.sqhk.co/fuvazuginu/dzqB8jb/kokeloxuwofanatefetateno.pdfIn PDF document text
    • https://pegiromilu.weebly.com/uploads/1/3/4/6/134683304/44b39b.pdfIn PDF document text
    • https://cdn.sqhk.co/goluxewimabu/0MTicgf/fitazuxa.pdfIn PDF document text
    • https://cdn.sqhk.co/miwavilusaji/xGghieq/40125240675.pdfIn PDF document text
    • https://bowineno.weebly.com/uploads/1/3/4/8/134868267/6a442f8b6.pdfIn PDF document text
    • http://kupugula.iblogger.org/ue_megaboom_3.pdfIn PDF document text
    • http://rujawobezixevib.iblogger.org/lamentations_of_jeremiah_sheet_music.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/jenisozazewubo/sidefafamimizejopubexis.pdfIn PDF document text
    • https://s3.amazonaws.com/fatikonavori/xixetubinumatej.pdfIn PDF document text
    • https://s3.amazonaws.com/bubeto/21540582583.pdfIn PDF document text
    • https://s3.amazonaws.com/vogubivajavofu/zulirazabimaseke.pdfIn PDF document text
    • https://s3.amazonaws.com/jozaponi/87683904360.pdfIn PDF document text
    • https://s3.amazonaws.com/tamovagag/37049371782.pdfIn PDF document text
    • https://s3.amazonaws.com/tazibabebamep/insulin_structure.pdfIn PDF document text
    • https://s3.amazonaws.com/doxifuba/how_to_process_marriage_certificate_in_the_philippines.pdfIn PDF document text
    • https://s3.amazonaws.com/zolerazowubow/aerodrom_zagreb_informacije_o_letovima.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_off0000e8ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8CE 5324 bytes
SHA-256: 45ee152fefc303068dae56da7f1e40cb14ba7ba62a7b827b5825a6b25f5dc850
font_01_sfnt_off0000fb03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB03 9904 bytes
SHA-256: a7458a88be4137afecfec6328b98542a3d33d854f40ca4120158208433a2205e

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