Malicious PDF — malware analysis report

Static analysis result for SHA-256 b85e26b46c65f515…

MALICIOUS

PDF

70.6 KB Created: 2021-04-04 15:46:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 1ce88cb19e7f66877ae5eca2e1b72291 SHA-1: 5f61adf883b5f87f3c61963f30dc46aa67071185 SHA-256: b85e26b46c65f51518d98dcf4724b714baf4ab084c71d65d2a834aae2eaf591a
126 Risk Score

Malware Insights

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

The PDF contains multiple external URIs, with one pointing to a suspicious domain associated with a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The presence of embedded URLs suggests an attempt to redirect the user to a compromised or malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://seumenha.ru/award?keyword=present+perfect+ever+never+just+still+already+and+yet+pdf PDF link annotation
    • https://lirajibabu.weebly.com/uploads/1/3/4/6/134635624/mufijipeworojob_moronikul_zopaledekiwobor_zovagavijulozir.pdfIn PDF document text
    • https://pikulevixabokof.weebly.com/uploads/1/3/1/6/131606248/5637183.pdfIn PDF document text
    • https://fesimubigezati.weebly.com/uploads/1/3/4/5/134515628/5418986ca26.pdfIn PDF document text
    • http://womenita.fun/87933570478ssnl6.pdfIn PDF document text
    • http://creditscorefix.info/suzujukasovepoziveveg9pff.pdfIn PDF document text
    • https://dujekiwirole.weebly.com/uploads/1/3/4/2/134266498/fb4b096469b2.pdfIn PDF document text
    • http://potawuzaj.medianewsonline.com/roxukupemi.pdfIn PDF document text
    • http://zibepifutidi.sportsontheweb.net/attachment_theory_ainsworth.pdfIn PDF document text
    • https://kitedagipan.weebly.com/uploads/1/3/4/8/134892955/pokedefibofa.pdfIn PDF document text
    • http://nipokaxa.getenjoyment.net/kidus.pdfIn PDF document text
    • https://kiseridebajesa.weebly.com/uploads/1/3/1/4/131408791/tumujivisenufizuza.pdfIn PDF document text
    • https://letitelow.weebly.com/uploads/1/3/4/5/134500939/ranedo_fizolu.pdfIn PDF document text
    • https://zeteleginogegop.weebly.com/uploads/1/3/4/5/134526156/modinuli.pdfIn PDF document text
    • http://bumululoru.mywebcommunity.org/amar_chitra_katha_tinkle_free_download.pdfIn PDF document text
    • https://vipunufevewe.weebly.com/uploads/1/3/0/8/130874016/sosezi_pajuzasejotim_gidevoxo.pdfIn PDF document text
    • http://meetsoda.pro/1320535963w2gjj.pdfIn PDF document text
    • http://italywow.info/little_fires_everywhere_trailer_legendado67tx1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rolewafofe.epizy.com/beale_street_restaurant_guide.pdfIn PDF document text
    • http://rozasazi.epizy.com/31827471208.pdfIn PDF document text
    • http://ketavulamuxi.epizy.com/btech_malayalam_full_movie_free.pdfIn PDF document text
    • http://kaxegukepoxar.rf.gd/linelorojufapiwareva.pdfIn PDF document text
    • http://tosogaxaf.rf.gd/inadvertent_disclosure_of_personal_information.pdfIn PDF document text
    • http://wivaxodi.onlinewebshop.net/22297923682.pdfIn PDF document text
    • http://lazuvubiwom.epizy.com/proses_diagenesis.pdfIn PDF document text
    • http://mosiwejajawam.rf.gd/zipebajadevedasixev.pdfIn PDF document text
    • http://laruvowamipesus.rf.gd/autocad_3d_commands.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_off0000d5a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5A2 5388 bytes
SHA-256: 6111265c75758c20bc84a4ec803e07fd4b56ccb653bb9a9f348e877e5cf011d4
font_01_sfnt_off0000e81c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE81C 10548 bytes
SHA-256: 3733cc7a6ab592d65c6d07ee25d78b68aa9650c5491f75661661547b8fdd6d60

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