Malicious PDF — malware analysis report

Static analysis result for SHA-256 263e1992f951a1ff…

MALICIOUS

PDF

80.0 KB Created: 2021-09-01 02:11:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 800880034c057627bd6b74f52ac076e2 SHA-1: 6d5e9d8ca7c0bdabecacbc6d4bbf382fdf46653a SHA-256: 263e1992f951a1ff87728315769141f9a06fd4869be3a977730cc33a8af08bfe
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains numerous links pointing to various domains, many of which are hosted on disposable or compromised CMS upload storage, suggesting a link farm designed to redirect users to malicious content. While no scripts were explicitly extracted, the nature of the links and the detection indicate 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 http://aisef.org/uploads/userfiles/file/file/gizetuwomixovu.pdf In PDF document text
    • http://446888.top/userfiles/file/lunifemabobopirepiwesa.pdfIn PDF document text
    • http://easytravel63.ru/ckfinder/userfiles/files/musaxofanajukomatifaxe.pdfIn PDF document text
    • http://szguilong.com/userfiles/files/febuwupajuzalelulib.pdfIn PDF document text
    • http://shriadinathbank.com/uploads/zodakodonogivumeb.pdfIn PDF document text
    • https://independentmusicleague.com/wp-content/plugins/super-forms/uploads/php/files/49b45cfe83f41ffcd78acb3c437ceab8/11198554043.pdfIn PDF document text
    • http://cravaluos.com/ckfinder/userfiles/files/xuniworinefofakeguj.pdfIn PDF document text
    • http://xn--80aagkbrca3apkgkee0a1bi.xn--p1ai/ckfinder/userfiles/files/musoluruwokide.pdfIn PDF document text
    • https://www.bakirkoytemsilcisi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a073334118---35672872884.pdfIn PDF document text
    • http://gialtour.it/themes/userfiles//files/japitisikideguxa.pdfIn PDF document text
    • http://xn--clinicaquirogavilario-vbc.com/wp-content/plugins/super-forms/uploads/php/files/7frrn5e53q3og4nsks9tjrhbb0/17500102869.pdfIn PDF document text
    • http://www.deopendeur.org/imgUser/file/borijim.pdfIn PDF document text
    • http://aranysolyomfeszke.hu/editor_up/tefunupixexutorom.pdfIn PDF document text
    • http://yoga-privates.com/yoga-privates/file/70959733639.pdfIn PDF document text
    • https://nhachoxebus.com/upload/fck/file/89287879368.pdfIn PDF document text
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/16078f6e05cfec---70808333958.pdfIn PDF document text
    • http://songhakbbq.com/uploads/files/9323729581.pdfIn PDF document text
    • https://gadd-asso.org/userfiles/file/vetivefimafa.pdfIn PDF document text
    • http://receptlap.hu/files/83525008021.pdfIn PDF document text
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609f60dc15a38---leworolexugomato.pdfIn PDF document text
    • http://thankschicken.com/uploads/files/81493598264.pdfIn PDF document text
    • http://csc0898.com/userfiles/file/20210708145329_eks4s5.pdfIn PDF document text
    • http://namhungholdings.com/uploads/ckfinder/files/78485471482.pdfIn PDF document text
    • http://nuyewrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/51598a607215ce84c6bc137ecc0846b8/16182039067.pdfIn PDF document text
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16094a7f25e8ad---51279626453.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=touch+typing+arabicPDF 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_off0000cd4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD4B 20268 bytes
SHA-256: d26960e55bdad071106bc5311b453b854989e0523737a47f3445287f6c3cb234
font_01_sfnt_off00010274.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10274 10624 bytes
SHA-256: 626227107a87d50f1fb4eb687a75ae11bbf11eaa4275e90b38d926b44c9e5ae0
font_02_sfnt_off00011a8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A8D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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