Malicious PDF — malware analysis report

Static analysis result for SHA-256 cfa2d62bc499a15e…

MALICIOUS

PDF

77.6 KB Created: 2021-04-02 20:17:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 02cc12ecb1da27e7e5011ce454832709 SHA-1: 82c0543598a9634f4cad0e3bda3ae97cd3f23966 SHA-256: cfa2d62bc499a15e38a342088a20e167b901254f48c1dea2a92f9edb3e73998f
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan distribution attempt. The document body, though heavily obfuscated, suggests a lure related to a 'job vocabulary test'. The presence of numerous external URIs, including 'https://resalured.ru/award?keyword=job+vocabulary+test+pdf' and 'http://nakidki-alkantara.xyz/incremento_de_pasivos_acumuladosj3ieo.pdf', strongly suggests these are the intended destinations for the user, likely leading to further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • 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 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://resalured.ru/award?keyword=job+vocabulary+test+pdf PDF link annotation
    • http://nakidki-alkantara.xyz/incremento_de_pasivos_acumuladosj3ieo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379046/normal_6014cb92480c0.pdfIn PDF document text
    • https://lepepapiminokuj.weebly.com/uploads/1/3/4/4/134493398/fasok.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444098/normal_6066b8b021a21.pdfIn PDF document text
    • http://lezigovedavide.getenjoyment.net/vejisodapofegevirix.pdfIn PDF document text
    • http://fefujikaviw.22web.org/nelajepudijawe.pdfIn PDF document text
    • https://pofitefe.weebly.com/uploads/1/3/4/6/134617546/nubozov.pdfIn PDF document text
    • http://gachihyper.xyz/kufapalusabossdb4k.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412996/normal_6056fbe6a3041.pdfIn PDF document text
    • https://filudatobo.weebly.com/uploads/1/3/2/6/132681654/5f5754c.pdfIn PDF document text
    • http://pedrons.space/27145220937dztoa.pdfIn PDF document text
    • https://zowamuzifam.weebly.com/uploads/1/3/1/1/131163536/4133064.pdfIn PDF document text
    • http://smartycredit.info/5055655755255ruf.pdfIn PDF document text
    • http://senorifeg.iblogger.org/97247846487.pdfIn PDF document text
    • http://riwaxutitono.iblogger.org/un_bel_morir_alvaro_mutis.pdfIn PDF document text
    • http://mugatazujiririv.iblogger.org/sociology_book_by_anthony_giddens.pdfIn PDF document text
    • http://alania365.ru/world_war_z_cross_platform_ps4_pct1jeo.pdfIn PDF document text
    • http://aydym.club/how_to_replace_skirt_on_kreepy_krauly_great_whiteqc58u.pdfIn PDF document text
    • http://mif-smeh.space/70962401758ykf26.pdfIn PDF document text
    • http://shoppingyxplus.xyz/306773878500jm7l.pdfIn PDF document text
    • http://lg-copyright.com/marshall_acton_bluetooth_no_soundbnldh.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://faleferesevo.onlinewebshop.net/25219234050.pdfIn PDF document text
    • http://vilepobafomunow.atwebpages.com/history_of_adventure_tourism.pdfIn PDF document text
    • http://beninoduvewer.epizy.com/bitdefender_vs_avast_performance.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_off0000f0c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0C1 5440 bytes
SHA-256: 20fadbd31f3ed7c7485bd748aab94dbfeeeb279abe9489ec9a5f71a9fa900fb1
font_01_sfnt_off0001035e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1035E 11068 bytes
SHA-256: 0982ea0aaa554b27528d0f7692fbdb78dac47cca3d0f6599764b0946a432bff0

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