Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e03f68236138773…

MALICIOUS

PDF

69.6 KB Created: 2021-09-26 21:59:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 396f374fb0d8e5ee0421f24b6d4953fd SHA-1: de5130f5dcd1cb6d7a74309f6520395d8ffb8b30 SHA-256: 2e03f6823613877360b3f917c88a7310ff745a0d3f8319d00ff6c7f0dde66ee5
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by a ML classifier and ClamAV, indicating a high likelihood of malicious intent. Heuristics indicate the document functions as a link farm, directing users to multiple external websites, some hosted on compromised CMS platforms. The presence of numerous unknown URLs suggests a phishing or malware distribution attempt.

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://www.hsbofmn.com/ckfinder/userfiles/files/tekomawetujijitovawefa.pdf In PDF document text
    • http://minhquoc.vn/ckfinder/userfiles/files/97900258953.pdfIn PDF document text
    • http://sweepinstyle.com/userfiles/file/45765836211.pdfIn PDF document text
    • http://giaexploring.it/userfiles/files/42332836685.pdfIn PDF document text
    • https://oncallanatomist.com/ckfinder/userfiles/files/sotugurefejofuvex.pdfIn PDF document text
    • http://wohntraumgmbh.at/32121016366.pdfIn PDF document text
    • https://santa.sg/images/users/00000000/files/79291943704.pdfIn PDF document text
    • http://tycoonmedical.com/userfiles/file/89314650420.pdfIn PDF document text
    • https://adasms.fr/userfiles/file/zunuwedesijanagivejo.pdfIn PDF document text
    • https://cometgroupinternational.com/ckeditor/ckfinder/userfiles/files/damuwilebereg.pdfIn PDF document text
    • http://altaprecision.com/userfiles/file/lobuvosa.pdfIn PDF document text
    • http://i-akparat.kz/ckfinder/userfiles/files/jubekaxagexonoxora.pdfIn PDF document text
    • http://redeyeldn.com/userfiles/file/7056067449.pdfIn PDF document text
    • https://morganmethod.tuesdaytrader.com/ci/userfiles/files/37804073880.pdfIn PDF document text
    • https://bi-kiesabbau.de/cmsimple/images/file/devuzizuvozisu.pdfIn PDF document text
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16150226907acb---gikatadisokikulobexa.pdfIn PDF document text
    • https://taksis.lv/taksis/userfiles/file/piral.pdfIn PDF document text
    • https://forumhotel.by/wp-content/plugins/super-forms/uploads/php/files/bogglocag7i2p60t3q67njkss0/16290722563.pdfIn PDF document text
    • http://attilacenter.org/userfiles/file/92615476060.pdfIn PDF document text
    • http://autosoftware.company/autoresponders_images/files/xurodure.pdfIn PDF document text
    • http://ulrike-mayer.de/userfiles/files/xowisuk.pdfIn PDF document text
    • http://kuppersbusch.hu/userfiles/files/jesafivukesivaxika.pdfIn PDF document text
    • http://bouwbedrijfansing.nl/userfiles/file/zuburew.pdfIn PDF document text
    • http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138060de2bbd---kuferikolenemit.pdfIn PDF document text
    • http://modelseafarm.com/kweb/ckfinder/userfiles/files/pilozubozub.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=restaurant+floor+plan+3dPDF 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_off0000b24a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB24A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ca5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA5C 14852 bytes
SHA-256: 4fd7ad6c5c6c6c289dbedb717ea0ad6f36538a04b8e1f071cb38de0d00d8a54a
font_02_sfnt_off0000efd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFD4 10716 bytes
SHA-256: eddbf8df7e30922fce7fc822ea29ed9c2c87cb6913c35b59d18024be07093d68

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