Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb98212f127d697f…

MALICIOUS

PDF

69.8 KB Created: 2021-09-25 03:10:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: b1b0aa5d7fd1196bdc54d6bc2aeb9336 SHA-1: ce99469b31452680d39081d8c96537daebda5d87 SHA-256: eb98212f127d697f2e5d2f568797dc69aeb30562528e204525711e77b742af9e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The document contains a link farm pointing to numerous disposable domains and compromised WordPress sites, suggesting an attempt to redirect users to malicious content. The presence of external URIs and the overall structure indicate a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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://catamma.ru/uplcv?utm_term=pubg+android+free+download PDF link annotation
    • http://queuemanagementsystems.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f431a24dda---nelosulo.pdfIn PDF document text
    • http://cdkkck.com/uploadfile/file/20210922011033.pdfIn PDF document text
    • http://irpuyesh.com/cache/fck_files/file/18218588515.pdfIn PDF document text
    • https://bushregenerators.com/userfiles/files/31751006874.pdfIn PDF document text
    • http://noospc.ru/SITE/files/editor/file/lasejobinitano.pdfIn PDF document text
    • https://nobleanimalsanctuary.org/wp-content/plugins/super-forms/uploads/php/files/tmp/ravipepumug.pdfIn PDF document text
    • http://gearonlaw.net/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/mikega.pdfIn PDF document text
    • https://www.emcp-pmce.ca/_includes/ckfinder/userfiles/files/notegugubujelazojaki.pdfIn PDF document text
    • http://sieuthibds.net/images/files/55703327892.pdfIn PDF document text
    • http://rebizplus.com/userfiles/file/53471289392.pdfIn PDF document text
    • https://catwalkdogcome.com/editor_upload_image/file/fobimuramo.pdfIn PDF document text
    • http://asqcert.net/files/files/72172636639.pdfIn PDF document text
    • http://dambi.pl/userfiles/file/13283783192.pdfIn PDF document text
    • http://drentmedischadvies.nl/uploads/files/kevepakozosimer.pdfIn PDF document text
    • http://tecnoservizi.com/userfiles/files/vafebuwen.pdfIn PDF document text
    • http://sutipatika.hu/userfiles/files/52727818484.pdfIn PDF document text
    • http://quantri.thaisonpalacehotel.com/upload/files/44225132992.pdfIn PDF document text
    • http://itaxabc.com/userfiles/file/20210901193035_1369599425.pdfIn PDF document text
    • http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613165a5ad2cb---22774989275.pdfIn PDF document text
    • https://sanmuabandoanhnghiep.org/images/content/files/segatosivawegawoguwos.pdfIn PDF document text
    • http://wedding-ideas.ru/ckfinder/userfiles/files/xuvuropekavowig.pdfIn PDF document text
    • http://ackerviewguesthouse.com/userfiles/file/86635688410.pdfIn PDF document text
    • http://recrute.fr/files/files/nukilofuwafozidaje.pdfIn PDF document text
    • http://music-summer-courses.eu/upload/files/nudoxuxujenu.pdfIn PDF document text
    • http://oppedisanorobertosrl.com/userfiles/files/lusekeduxunotezum.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_off0000b1dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB1DC 10592 bytes
SHA-256: 544fa2cf732bfc53eb9abaf354355a9b46102c718ab2aebc3905c718e609927e
font_01_sfnt_off0000c9f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9F2 15588 bytes
SHA-256: 6282c4e53be233ff0b37783901ca4ab89b0bf0dba61077a6e5d98346df7db123
font_02_sfnt_off0000f1ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1AE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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