Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e24c9b3dc5f74b3…

MALICIOUS

PDF

81.4 KB Created: 2021-09-21 22:25:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 34afdb32c4b65387e3d7255130f1050d SHA-1: 03c10aaaaedc334d09c4a0de090bd1afc5efc9ff SHA-256: 0e24c9b3dc5f74b372a898550bb7c53f815a20327dc02f7a8fccc42c3c78417d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating it's likely a phishing or malicious content delivery mechanism. The heuristics reveal it functions as a link farm, with many embedded URLs pointing to various websites, including some hosted on compromised CMS platforms. The primary purpose appears to be directing users to potentially harmful content or facilitating SEO manipulation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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 http://sgrappresentanze.eu/userfiles/files/1949992255.pdf In PDF document text
    • https://tucsonhomewindowtint.com/wp-content/plugins/super-forms/uploads/php/files/ea4f594831fa7608842b279ba4bdb2b1/74722577290.pdfIn PDF document text
    • http://hidropro.hu/upload/fukakasozudewoja.pdfIn PDF document text
    • https://armour-technoz-ca.otzol.net/ckfinder/userfiles/files/tesijejadosodoxisowew.pdfIn PDF document text
    • https://letstravelforacause.com/miet/assets/files/62630242225.pdfIn PDF document text
    • https://transmar.biz/ckfinder/userfiles/files/71605566061.pdfIn PDF document text
    • https://hsse.cl/files/lujarifugifimipo.pdfIn PDF document text
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132b69328309---61476539515.pdfIn PDF document text
    • https://grup-insaat.com/userfiles/file/lejasazebas.pdfIn PDF document text
    • https://shibbirs.com/media/files/lanoruz.pdfIn PDF document text
    • https://eatorhours.org/e-bussiness/fckimages/file/xijame.pdfIn PDF document text
    • http://skuplaptop.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16135303a466ba---zevofavorojebiferaxujab.pdfIn PDF document text
    • http://fteq.ru/files/file/lifevazinalinivotades.pdfIn PDF document text
    • http://surveycook.com/upload/tmp/202109/file/liraxufegur.pdfIn PDF document text
    • http://yourmoneyyourbank.com/uploads/File/kufizonepadagetemebi.pdfIn PDF document text
    • http://tongrentangthai.com/UserFiles/file/fobagozonedebasog.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136815e7b768---bazupafukebivavuridezis.pdfIn PDF document text
    • https://pachetedeturism.ro/images/files/lojajazajalipiga.pdfIn PDF document text
    • http://www.css-jp.com/upfile/files/2021/09/09/mupovipuno.pdfIn PDF document text
    • https://barrier.exma.cl/ckfinder/userfiles/files/wukuvuluresupeket.pdfIn PDF document text
    • http://uforoi.com/app/webroot/uploads/files/jakufutopirog.pdfIn PDF document text
    • http://jcbcharpentebois.com/ressource/site-image/files/naziladibajawumifasat.pdfIn PDF document text
    • http://ebd.su/UFD/7623/files/55688070136.pdfIn PDF document text
    • https://selispin.com/calisma2/files/uploads/60390001249.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=see+instagram+pictures+without+accountPDF link annotation
    • 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_off0000d811.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD811 17828 bytes
SHA-256: f2e6483d374097d24fed1aff7b1d5d3cd159ca1eeba681054d47c9ea95c28de7
font_01_sfnt_off00010682.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10682 11036 bytes
SHA-256: b2e22c3bd8fc05ab9fa9e1d8f38e75cedba16584add81d65f0f4489e9c6e68eb
font_02_sfnt_off0001201a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1201A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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