Malicious PDF — malware analysis report

Static analysis result for SHA-256 e401d877cc78db24…

MALICIOUS

PDF

72.0 KB Created: 2021-09-22 11:03:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 7cc2c5f9ec15797e7af20cc99d2eed12 SHA-1: 975fdf059fc425dab593647680898e6a5565e863 SHA-256: e401d877cc78db24b5cbedd91d48746f11e3ff9aa49aefd39bcc28abe870dc84
156 Risk Score

Malware Insights

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

The PDF file contains multiple links, many of which are hosted on compromised websites or disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of a URL with a 'download' query parameter and the ClamAV detection as 'Pdf.Phishing.Trojan' strongly indicate a phishing or malware distribution attempt. No scripts were extracted, but the overall structure and URL patterns are consistent with a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://inwebjor.ru/uplcv?utm_term=download+ea+sports+cricket+07+for+android PDF link annotation
    • https://letstravelforacause.com/miet/assets/files/90403722569.pdfIn PDF document text
    • http://fatimaartwork.com/userfiles/file/rijagimopobuzar.pdfIn PDF document text
    • https://mudrun.com/home/mud/public_html/ckfinder/userfiles/files/96285660356.pdfIn PDF document text
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1613e08461df8a---ripubixevu.pdfIn PDF document text
    • http://color-gateway.com/userfiles/file/rexuk.pdfIn PDF document text
    • https://pisangmanis.com/contents/files/rawikikesuruberu.pdfIn PDF document text
    • http://worldplastsolution.com/ckfinder/userfiles/files/bubikesijug.pdfIn PDF document text
    • http://top-rubber.com/admin/fckeditor/editor/filemanager/connectors/upload/file/gezokukepima.pdfIn PDF document text
    • http://shopphutungmayphat.com/upload/img/files/75951464403.pdfIn PDF document text
    • https://aymexco.eu/ckfinder/userfiles/files/xafadexiluzimunazuvawo.pdfIn PDF document text
    • https://kit-veron.my/ckfinder/userfiles/files/mowubapa.pdfIn PDF document text
    • http://keacg.com/upload/files/mitudiboludal.pdfIn PDF document text
    • http://alwaysshine.com/fileimage/file/zojomojusesalugotudefage.pdfIn PDF document text
    • https://amd-export.com/site/upload/file/mebapawolijolisos.pdfIn PDF document text
    • https://cailux.lu/userfiles/files/gozamiweput.pdfIn PDF document text
    • https://classconnbio.com/img-jacson/files/96691503727.pdfIn PDF document text
    • http://xn----7sbezcba9a5aggb3j.xn--p1ai/ckfinder/userfiles/files/43496424175.pdfIn PDF document text
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/16149b9ac98ec7---guket.pdfIn PDF document text
    • https://www.frontiermyanmar.com/sites/all/libraries/ckfinder/userfiles/files/volitikugov.pdfIn PDF document text
    • http://zamdq.com/filespath/files/20210907174829.pdfIn PDF document text
    • http://archiw.gbpopatowiec.pl/img/upload/files/wonexepijelikaki.pdfIn PDF document text
    • http://sunway.me/ROOT_PATHuploads/file/061651084960.pdfIn PDF document text
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/161380329aa0da---64946557513.pdfIn PDF document text
    • http://avvocato-callegaro.it/public/file/lotevezekivebememalet.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b94f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB94F 10964 bytes
SHA-256: aa0046caff0338cdea9e7eb64e88a2dddd249982a6d2051b82fe287c664afafa
font_01_sfnt_off0000d2f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2F6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000eb08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB08 15320 bytes
SHA-256: 687f504e4f75e596d9c848df8dc9fae87285c899542dc5e59b96fe2377e776e6

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