Malicious PDF — malware analysis report

Static analysis result for SHA-256 497ae18cbbf116c9…

MALICIOUS

PDF

81.5 KB Created: 2021-09-05 11:53:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 6458b62d5708a0f52bcbe750f66beeed SHA-1: 4b325dd6a969d8a36d7ebf59ca593dcb53b23c55 SHA-256: 497ae18cbbf116c988fe9974545ce08ce7c130389e7fc2f9d0425a4e0b987d08
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. It contains numerous URLs that form a link farm, likely intended to redirect users to phishing sites or download further malware. The PDF structure and link farm behavior are consistent with common phishing lures.

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 http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608aed1e701fb---nenefowuwoxov.pdf In PDF document text
    • http://anadolumatbaa42.com/genelresimler/file/vimerul.pdfIn PDF document text
    • https://minhgianggroup.vn/upload/files/bexewewemupafukarerubavop.pdfIn PDF document text
    • https://avonsteel.com/UserFiles/file/bumofuxiwaxax.pdfIn PDF document text
    • http://colleges-in-tamilnadu.com/FCKeditor/userfiles/file/momupano.pdfIn PDF document text
    • https://blugarden.eu/file/36357483559.pdfIn PDF document text
    • https://mithermomix.com.mx/wp-content/plugins/super-forms/uploads/php/files/ce18f35641ed2617ebe1ff4daaa56cb9/27469971482.pdfIn PDF document text
    • https://www.18fire.com/wp-content/plugins/super-forms/uploads/php/files/6cf8d2df63dd6b3929c701035efb5e59/86080321185.pdfIn PDF document text
    • http://lukoilmarine.com/ckfinder/userfiles/files/xewalamakebobekezefefa.pdfIn PDF document text
    • http://slowjamsundays.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0b5ecbe1be---gitasodopujubirid.pdfIn PDF document text
    • http://prof-cosmetics.com/upload/files/91049712671.pdfIn PDF document text
    • https://organicfertilizerproduction.com/d/files/rodefaximob.pdfIn PDF document text
    • https://cms.blauraum.com/wp-content/plugins/super-forms/uploads/php/files/ad333a02a9065729499c2dd7130cf9e4/65856013507.pdfIn PDF document text
    • http://stl-hk.net/userfiles/73214096143.pdfIn PDF document text
    • https://toskov-yordanov.com/userfiles/file/49304521610.pdfIn PDF document text
    • http://agrobud.net/uploaded/file/relebara.pdfIn PDF document text
    • http://allamericannursing.com/userfiles/file/nibuzipevujavedapivofaj.pdfIn PDF document text
    • http://umrllc.com/userfiles/files/41827663441.pdfIn PDF document text
    • https://ap-qatar.com/userfiles/files/pevadilapopipexujo.pdfIn PDF document text
    • http://pogotowienaukowe.com/Upload/file/63444109554.pdfIn PDF document text
    • https://teenvolunteerhouston.com/wp-content/plugins/super-forms/uploads/php/files/b4bee62c757aa189e62aa75506976a08/joxowipuzegowulegi.pdfIn PDF document text
    • http://www.primalegal.eu/wp-content/plugins/super-forms/uploads/php/files/cllml3bif2gnk0663aftjneb43/jijegixaxoleg.pdfIn PDF document text
    • http://df-2.de/images/daten/file/bugivumuluwusivifer.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=geog.1+pdf+free+downloadPDF 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_off0000cf9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF9A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e7ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7AC 22292 bytes
SHA-256: 1333cecd81122a6234f95968c6c3411bd8f15044c9b8a7278fc19ee10b053021
font_02_sfnt_off0001202f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1202F 10560 bytes
SHA-256: 8bdb5c034fc78e0063425ee7594e0a3eb6cd0627de1c68e225eb0b04c37b8571

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