Malicious PDF — malware analysis report

Static analysis result for SHA-256 fdf1d1f63f7700d7…

MALICIOUS

PDF

79.9 KB Created: 2021-03-18 09:26:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 01506d6f16b3e01b189840374b6054f4 SHA-1: 48740d438ea0a4f9770922b6e44a91f6fb314511 SHA-256: fdf1d1f63f7700d7e43c405d51f7e9ba812b4a8fbc3e2c31723f0ca99d6192c3
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.007 JavaScript

This PDF file was identified as malicious by ML classifiers and ClamAV, specifically flagged as a credential phishing lure impersonating the 'Target' brand. It contains multiple external URIs, including a link farm hosted on disposable domains, suggesting an attempt to redirect users to malicious sites. The presence of embedded JavaScript, though obfuscated, likely contributes to the redirection or phishing mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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
  • 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://lirurarupo.weebly.com/uploads/1/3/4/7/134770738/8cf8e7d94d018f.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://golowaki.ru/wix?keyword=identity+theft+math+worksheet+high+school PDF link annotation
    • https://lirurarupo.weebly.com/uploads/1/3/4/7/134770738/8cf8e7d94d018f.pdfIn PDF document text
    • http://kimisorunutom.medianewsonline.com/pdf_to_word_converter_software_download_free_for_windows_10.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4394071/normal_5fcfab6e3a6de.pdfIn PDF document text
    • http://uk-delfin.ru/10081230348m7k77.pdfIn PDF document text
    • https://favaruzikab.weebly.com/uploads/1/3/4/8/134871436/pawosulipemelewasuf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391624/normal_6037edcf966b4.pdfIn PDF document text
    • https://bodumiwi.weebly.com/uploads/1/3/1/4/131406735/d85864c167f.pdfIn PDF document text
    • https://dakezevowefop.weebly.com/uploads/1/3/6/0/136088489/5bf174756f.pdfIn PDF document text
    • http://vrestoran.info/lukunejugupu7o4fz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472479/normal_5fe679c3f0bba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427086/normal_60149ae4aa315.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448735/normal_603c279c74df0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447434/normal_5ff8a9e1805dc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375704/normal_5fca0940ea214.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450721/normal_604161c2d6292.pdfIn PDF document text
    • http://electriccannoz.club/fubudodosokujudokusokesow7l8l.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365626/normal_5ff38202d349c.pdfIn PDF document text
    • http://cookwellbakewell.com/cheat_engine_6._3_for_android_apkjsfau.pdfIn PDF document text
    • https://fomimixa.weebly.com/uploads/1/3/4/7/134775862/2597889.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470380/normal_602ae01dced77.pdfIn PDF document text
    • http://liolika-rsya.ru/mepikogilodetuzixudokemuflg8c2.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/rijaliwiguvex/dark_souls_3_guia_de_trofeus.pdfIn PDF document text
    • https://s3.amazonaws.com/fasomusogapovi/guided_canyoneering_in_zion.pdfIn PDF document text
    • https://s3.amazonaws.com/sixolose/grading_rubric_template_free.pdfIn PDF document text
    • http://gapoxuvopa.onlinewebshop.net/40570386932.pdfIn PDF document text
    • http://safedoguno.onlinewebshop.net/miwifogefopima.pdfIn PDF document text
    • https://s3.amazonaws.com/nevovumowa/andyroid_for_macbook.pdfIn PDF document text
    • https://s3.amazonaws.com/kudefem/mofojonadizotejajot.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_off0000f51f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF51F 5628 bytes
SHA-256: c10013ba9ce235bf45e026656dee0b4f9c1d08208145ecb1ff24bc5c82b12441
font_01_sfnt_off00010831.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10831 11644 bytes
SHA-256: f3428ae09d7780cf733c1237dd409b84b9b41ae7a664f4354c41afd753f49535

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