Malicious PDF — malware analysis report

Static analysis result for SHA-256 3342542cdb8a6be2…

MALICIOUS

PDF

81.1 KB Created: 2021-09-02 09:08:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 87c4f513fe8909901b9581636bbe6806 SHA-1: ff55288415ec7a2ea12828b3ee04bd8e08b5378d SHA-256: 3342542cdb8a6be2f5e9507fbcc682785d731c0e3e4072ab773f0ffa51f34032
196 Risk Score

Malware Insights

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

This PDF file is identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of a phishing and malware distribution scheme. It functions as a link farm, directing users to multiple external websites, some of which are hosted on compromised CMS platforms. The document is also password-protected, a common tactic to bypass gateway security filters and deliver encrypted payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://exosushi.com/uploads/files/88390083698.pdf In PDF document text
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f7ca7d6c66e---21536392630.pdfIn PDF document text
    • http://allier-genealogie.org/File:/86848227539.pdfIn PDF document text
    • http://aranysolyomfeszke.hu/editor_up/pabasotiwugidufoleduzigol.pdfIn PDF document text
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/fbe16bb03a13f59ee8af5f1b35420344/15289844619.pdfIn PDF document text
    • https://kolodezrus.ru/wp-content/plugins/super-forms/uploads/php/files/2024e2648ea0b4df9fc915f95f7569ec/58231780479.pdfIn PDF document text
    • http://gediklimakinahidrolik.com/resimler/files/gukojexavapa.pdfIn PDF document text
    • https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa94c39e25b---bofozaziwuxewul.pdfIn PDF document text
    • https://harpethvalleypto.org/wp-content/plugins/super-forms/uploads/php/files/d7c9e313ac17b20ebae13d147c141ad8/segeli.pdfIn PDF document text
    • http://polkovnik.su/upload/file/zatizawetikekiwisi.pdfIn PDF document text
    • https://kachhiproperties.com/wp-content/plugins/super-forms/uploads/php/files/umprsrp3rurghc2b6d62tolat2/kibitubonenebir.pdfIn PDF document text
    • http://iphysiology.ru/upload/98746656971.pdfIn PDF document text
    • https://theshairpodcast.com/wp-content/plugins/super-forms/uploads/php/files/5b1468de25b64b9e9e4b6f32418625a3/bagazu.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/9cb6ff7679c46c40485c9956ec9ef993/safunenidev.pdfIn PDF document text
    • https://faprosid.com/file/89118534755.pdfIn PDF document text
    • http://df-foundry.net/d/files/2475467775.pdfIn PDF document text
    • http://nicolalazzarotto.com/userfiles/files/xuvimimaba.pdfIn PDF document text
    • https://mmeasar.com/mmeasarfiles/file/piteruwopavumibefeluweja.pdfIn PDF document text
    • https://open-call.fr/uploaded/files/mafaxajusufotefamiwez.pdfIn PDF document text
    • http://fsoa.cn/userfiles/file/87850924622.pdfIn PDF document text
    • http://luvnchrlysenglishtoys.com/clients/861429/File/16944069936.pdfIn PDF document text
    • http://ifaistos.reality.gr/~triantaf/images/file/poguwixotofis.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/1610061923110c---sirupeli.pdfIn PDF document text
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/1610d631dbf3a6---62665790847.pdfIn PDF document text
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608079ffe13ab---delofe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=download+prince+of+persia+ppssppPDF 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_off0000d722.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD722 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ef39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF39 10604 bytes
SHA-256: 714a86964bf1de70ba11ea44d73b6cf87e460c74a583ea28757a2675d09df4f0
font_02_sfnt_off00010791.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10791 17780 bytes
SHA-256: 5c061be2322af22fa21943f08aa1f2745e47c33f00d7cb642c2d8c9a7874ae55

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