Malicious PDF — malware analysis report

Static analysis result for SHA-256 a30f17b26af54736…

MALICIOUS

PDF

84.4 KB Created: 2021-09-06 13:46:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: daa2330cd75a36deaeec47c404ade6f3 SHA-1: ce375b105925fb59bcd1f64452536c614758c127 SHA-256: a30f17b26af547368f577901238b3053e834c4e6a21f6edaf0716e6115a6ba51
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by a machine learning classifier and ClamAV, with heuristics indicating it functions as a link farm pointing to compromised CMS uploads and disposable hosting. The embedded URLs suggest a phishing or spam campaign designed to redirect users to potentially malicious content. No scripts were extracted, but the PDF structure and numerous external links are indicative of a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://wastran.ru/uplcv?utm_term=make+pdf+files+into+one PDF link annotation
    • https://www.tanyadantus.com/wp-content/plugins/super-forms/uploads/php/files/7f31de169ea0015fbd1fb4bdd7706eab/15448177666.pdfIn PDF document text
    • http://kdbelektrotechniek.nl/uploads/file/87528827088.pdfIn PDF document text
    • http://app8itebarandgrill.com/admin/images/file/bagabutunibazagita.pdfIn PDF document text
    • http://fongyoskert.hu/userfiles/files/zatidatod.pdfIn PDF document text
    • http://fxlcd.com/upload/file/xolukigokagibate.pdfIn PDF document text
    • https://dianthusindustrial.com/resimler/files/79089809545.pdfIn PDF document text
    • https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fe0e34cf236---gomodojonodi.pdfIn PDF document text
    • https://humanistbeauty.com/wp-content/plugins/super-forms/uploads/php/files/q8hptgrbjg0beek7aegdvc1sir/43547045344.pdfIn PDF document text
    • http://www.aceitunasdelguadalhorce.es/ckfinder/userfiles/files/zomadeninexokotadefikowi.pdfIn PDF document text
    • http://jiin-torng.com/uploadfiles/20210829120903.pdfIn PDF document text
    • http://creptiles.dk/userfiles/file/39145521723.pdfIn PDF document text
    • http://plenaadoracao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160719c1c37446---69059960608.pdfIn PDF document text
    • http://call.ae/wp-content/plugins/formcraft/file-upload/server/content/files/1606efa71debf2---tatarege.pdfIn PDF document text
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/16076144062c73---20732552087.pdfIn PDF document text
    • https://nazrabilisim.com/calisma2/files/uploads/32142343446.pdfIn PDF document text
    • https://medosojewellery.com/userfiles/files/60892952435.pdfIn PDF document text
    • http://dlt-nkp.com/fileupload//file/96817475126.pdfIn PDF document text
    • https://niboparis.com/upload/fckeditor/files/jajogozuwiveturanuwo.pdfIn PDF document text
    • https://bleikss.com/userfiles/file/95220365657.pdfIn PDF document text
    • https://pirkitpadangas.lt/ckfinder/userfiles/files/63393266673.pdfIn PDF document text
    • http://massarentearchitettura.com/userfiles/files/menez.pdfIn PDF document text
    • http://janandpoos.com/clients/872640/File/91531481233.pdfIn PDF document text
    • http://cngwalk.com/fckeditor/userfiles/image/kokoj.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e65a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE65A 17796 bytes
SHA-256: 7c71440160bcc8a005d332ad445c709d79de097c9a1d8200e9b1db1eef5ef164
font_01_sfnt_off000113dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113DC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012bf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BF3 10476 bytes
SHA-256: e8f6d7319fcba48ee26d86f300dd65ff608c89f39cabc059e8e5e03ddd14a3e7

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