Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0ea413677f364ec…

MALICIOUS

PDF

79.0 KB Created: 2021-05-07 15:15:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: c33a9b3b569b08c67e3dd973a5d4f217 SHA-1: b277471d9f245de5c767d805066e78bf307f4fe9 SHA-256: e0ea413677f364ec1c5b31b1c9a34297c3d8116e7a1d4ad38dbc5d8de4727f60
236 Risk Score

Malware Insights

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

This PDF file contains numerous links to external websites, many of which are part of an SEO link farm designed to redirect users. The heuristic 'PDF_SEO_LINK_FARM' and 'PDF_SEO_UTM_REDIRECTOR_LINK' indicate a phishing or malware distribution attempt. The presence of embedded URLs and the ML classifier's high confidence score further support this assessment. No scripts were extracted, but the overall structure points to a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 7

  • 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 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.
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://mezovuduw.ru/strik?utm_term=does+emdr+therapy+really+work PDF link annotation
    • https://gorejirulikem.weebly.com/uploads/1/3/4/7/134738880/potejadas.pdfIn PDF document text
    • https://zosumomaxin.weebly.com/uploads/1/3/4/0/134040430/mukidinod_banekopafa_suzidupuzuleseg.pdfIn PDF document text
    • https://lepepapiminokuj.weebly.com/uploads/1/3/4/4/134493398/2e61f9d1.pdfIn PDF document text
    • https://tigibivimibi.weebly.com/uploads/1/3/4/3/134344299/rivegeros.pdfIn PDF document text
    • https://rajopolaxobi.weebly.com/uploads/1/3/1/4/131406270/03dd60e2da87.pdfIn PDF document text
    • https://gurovepulebeguj.weebly.com/uploads/1/3/1/1/131163897/eec638ee41f1fd.pdfIn PDF document text
    • http://privateguardingserviceagainstdanger.site/spanish_words_with_english_translation_and_pronunciationgutkz.pdfIn PDF document text
    • http://golomashvanna.xyz/17779362325atp7h.pdfIn PDF document text
    • http://1xbet-registr.site/parrot_bubbles_in_poopajc7n.pdfIn PDF document text
    • https://xobojurum.weebly.com/uploads/1/3/4/5/134599739/zadavumisomovo.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/ximupuv/amazon_audible_for_mac.pdfIn PDF document text
    • https://5d3a357a-25b2-4459-9cd8-210b235f7b36.filesusr.com/ugd/45e30f_454620a4a3e44c4b8cbe74cc230e00ff.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bulozor/talking_angela_2_games_free.pdfIn PDF document text
    • https://7ffe38df-ef78-47a1-8632-a9c579db478a.filesusr.com/ugd/8ff694_6083e380e5be4ed4a47af49f832cc062.pdf?index=trueIn PDF document text
    • https://e82ff0bd-cb1a-4782-8b92-0a0fb7657660.filesusr.com/ugd/d17951_2d9a2594ac734b0f9af54b4cadaaa1f2.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gumegulaxi/gutadelemajulo.pdfIn PDF document text
    • https://748f1d53-d141-46c1-926a-d14fc69713a3.filesusr.com/ugd/e3ed1f_011faeec33454f059e98baf2c9f11087.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mexesazaxasa/7111759651.pdfIn PDF document text
    • https://s3.amazonaws.com/lovomijelun/79246831156.pdfIn PDF document text
    • https://44dd6259-7513-41c7-b2f1-b2b1fc385d2e.filesusr.com/ugd/63022f_3686620c0ea44ddf8b534b15d673cd2e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/muxozuvalubi/composition_of_functions_practice_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/fusidejebi/62950800319.pdfIn PDF document text
    • https://s3.amazonaws.com/bisegilupuf/mixowurojirizewur.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_off0000f7e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7E0 5456 bytes
SHA-256: bbf51e042737d1d3d52220fb7389b04de6514003d0656ef35c211d261354549e
font_01_sfnt_off00010a5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A5B 10524 bytes
SHA-256: 1876a9a10231519410310d9f3223f49baa0a14e15a25ccdd8279c2b0ab18a1c7