Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ff87e75f36dfed8…

MALICIOUS

PDF

82.1 KB Created: 2021-03-23 21:38:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 57ef5dc7a0d899d6661e0a6e6cafb608 SHA-1: ffd17ab44be5dd8502fb6b10080ecd185790d5e5 SHA-256: 0ff87e75f36dfed860e4e1f025ce752c28bbb12755f514f06bee953888bd61ad
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1204.002 Malicious Link

The sample is identified as a malicious PDF by multiple heuristics and ML classifiers, specifically flagging it as a brand-impersonation credential phishing lure for Amazon. It contains numerous embedded URLs, many pointing to disposable hosting or redirectors, suggesting a phishing campaign. The PDF's structure and embedded content indicate it's designed to trick users into clicking malicious links, likely leading to credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://rurajutudap.weebly.com/uploads/1/3/1/4/131437622/9029229.pdf.
  • 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://lozipotod.ru/wix?keyword=urbanization+science+worksheet PDF link annotation
    • https://cdn.sqhk.co/genizataxom/ghgeib4/lopuzevezevawajulisevod.pdfIn PDF document text
    • https://rurajutudap.weebly.com/uploads/1/3/1/4/131437622/9029229.pdfIn PDF document text
    • http://rikororasikenek.iblogger.org/rationalizing_denominators_worksheet_key.pdfIn PDF document text
    • https://nolulanulupu.weebly.com/uploads/1/3/1/3/131379612/jizopumugilamemi.pdfIn PDF document text
    • https://mabodezi.weebly.com/uploads/1/3/4/5/134590290/4353896.pdfIn PDF document text
    • http://fesabip.iblogger.org/equity_research_analyst_interview_questions_and_answers.pdfIn PDF document text
    • https://cdn.sqhk.co/kezixowog/jjjhhgx/pisirufefivaw.pdfIn PDF document text
    • https://fovivijidilel.weebly.com/uploads/1/3/4/8/134888041/b9848690c9.pdfIn PDF document text
    • https://cdn.sqhk.co/xuxumududu/eEHjjid/queen_greatest_hits_offline_full_album_download.pdfIn PDF document text
    • http://jawunefuda.mygamesonline.org/xefuxisetotetuvivolol.pdfIn PDF document text
    • http://zizodoroluxonaf.sportsontheweb.net/95576402915.pdfIn PDF document text
    • https://metasabuvaro.weebly.com/uploads/1/3/2/6/132681671/xaboxix-joxewonem-vurugamoxuw.pdfIn PDF document text
    • http://manamuposa.getenjoyment.net/how_much_oil_does_a_craftsman_power_washer_take.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nimobavaze.epizy.com/67050265184.pdfIn PDF document text
    • http://susesibukof.epizy.com/idolmaster_side_m_guide.pdfIn PDF document text
    • http://nebejobibaveb.epizy.com/74080402707.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa28e5bd-62dd-4057-836c-8eb89d99243d/what_are_the_8_circle_theorems.pdfIn PDF document text
    • http://dajomilot.atwebpages.com/succeeding_with_agile_software_development_using_scrum_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9854359-a94a-4d6d-9c11-1bbb20ef8d7d/15879123740.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_off000102ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102AB 5192 bytes
SHA-256: d5ca71f38321c6b6fcbba3d101539cca9b15cabe1b22a7b22e1c4246ee7eb953
font_01_sfnt_off00011470.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11470 11480 bytes
SHA-256: 814110b6924300f93bffcc1bb0df9a05a07a2edafcc0e460e68689e871e4ae83

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