Malicious PDF — malware analysis report

Static analysis result for SHA-256 30675162524715c8…

MALICIOUS

PDF

83.7 KB Created: 2021-07-18 10:58:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 4497fecddb80e1ab2302ccd20f160877 SHA-1: 035d3f7c2f7ca91620a1caf0f2b85a50ccc551d7 SHA-256: 30675162524715c891c7981b91623c2929091ab968222731096e9aef959fec6a
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 an ML classifier flagged it with high confidence. Multiple heuristics indicate it functions as a link farm, directing users to various external PDF files hosted on potentially compromised CMS uploads or disposable domains. The embedded URLs suggest a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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.paseppe.gr/ckfinder/userfiles/files/15934116297.pdf In PDF document text
    • http://mariautonoleggiomarsala.it/userfiles/files/58268786661.pdfIn PDF document text
    • https://centar-znr-zop.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160c53fe25be9e---75205402692.pdfIn PDF document text
    • http://fxmeat.com/upload/file/bc96a6214df1e4e37ac126daf1f355b2.pdfIn PDF document text
    • https://eandjfamilyhealthcenter.com/wp-content/plugins/super-forms/uploads/php/files/11f12563de75116ae9e3aa8a94cbe916/kosegiwufuz.pdfIn PDF document text
    • http://color-gateway.com/userfiles/file/ritumedazokowo.pdfIn PDF document text
    • http://informerfitness.com/wp-content/plugins/super-forms/uploads/php/files/a2c3e5f00ee9422fbf702f9af9bb6075/68965651316.pdfIn PDF document text
    • https://energooptima.hu/upload/File/82819983949.pdfIn PDF document text
    • https://area34.info/wp-content/plugins/super-forms/uploads/php/files/6bmhbo287nq0lij86ajngqguk1/xekidodi.pdfIn PDF document text
    • https://bio-obst-und-gemuese.de/userfiles/file/bulowukowezidebukavepepo.pdfIn PDF document text
    • http://falegnameriacastiglione.it/userfiles/files/ziwova.pdfIn PDF document text
    • http://boilerservis.ru/uploads/files/54668744321.pdfIn PDF document text
    • http://rivieahk.com/clients/5/51/51325344bd1517f257d6959d5350918e/File/daxavupufarusunibo.pdfIn PDF document text
    • http://www.mediacomriccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/16083326f43124---mizezatijadatukose.pdfIn PDF document text
    • http://www.alex-vasilkov.ru/images/wisdom/file/gukamazaxoboxuwodifizamo.pdfIn PDF document text
    • https://reflexlighting.com/wp-content/plugins/super-forms/uploads/php/files/a8ddcd410661484f99e8c397e9ee7a4f/minejiraniv.pdfIn PDF document text
    • http://harrisonsfamilyreunion.com/clients/62911/File/785360907.pdfIn PDF document text
    • http://www.kevimotor-rock.hu/files/files/36210079187.pdfIn PDF document text
    • http://dolphinegypt.net/userfiles/file/sidumosodesexuwivomutiru.pdfIn PDF document text
    • https://www.andimoda.com/wp-content/plugins/super-forms/uploads/php/files/7935ad909bf08b0464ea0351eb35ceef/xitizagovarigokazi.pdfIn PDF document text
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b06152dac0b---65089238624.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=what+is+the+aim+of+your+life+interview+questionPDF 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_off0000e4ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4AD 16728 bytes
SHA-256: b7c97fcc67640c6a58f5e68ddd36b582c702e18c8f9239f10675ccf5c3898a6e
font_01_sfnt_off00010fd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FD3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000127ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127EA 10984 bytes
SHA-256: ec850cbc044b85fca7b192686ba72ce8e09df59fb2f3cbfc1e5740ff1c9ea23a

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