Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e4643b6a351f65d…

MALICIOUS

PDF

88.8 KB Created: 2021-07-18 15:11:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: d9d81d370e5cc29dd4bd30b4788bda3c SHA-1: 8e015e57ea45c6182f45f9c61efe083af9f5f154 SHA-256: 0e4643b6a351f65d969f0f4131c209a642266f981dd27ca2f1d6104324098024
156 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs, many of which point to compromised WordPress sites or disposable domains, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly support its malicious nature. No scripts were extracted, but the structure and URL distribution are indicative of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://perfecthospital.net/FCKeditor/file/47544862678.pdf In PDF document text
    • http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/16085a72b33d89---30081897188.pdfIn PDF document text
    • http://comp-art.ru/userfiles/file/34012271199.pdfIn PDF document text
    • https://paloaltospeakerseries.com/wp-content/plugins/super-forms/uploads/php/files/e894ea6be886da6a48f7accf37ebd5d7/24864103783.pdfIn PDF document text
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a01aef86cd4---ximuxolafuwewegonowa.pdfIn PDF document text
    • http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160ad29287d867---jibixituko.pdfIn PDF document text
    • http://kzlo.pl/fotki/fotki/file/ferugenirosajekati.pdfIn PDF document text
    • http://spalovnachemolak.sk/userfiles/file/6968253073.pdfIn PDF document text
    • https://livre-art.com/ckfinder/userfiles/files/tiloximitamuzugepurosevev.pdfIn PDF document text
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1607b3b90da084---91573531268.pdfIn PDF document text
    • https://personnelcle.com/userfiles/file/vivuxomagazozuladawifa.pdfIn PDF document text
    • http://jandebruijn.com/uploadimages/files/90980549498.pdfIn PDF document text
    • https://www.westcountrystoves.co.uk/wp-content/plugins/super-forms/uploads/php/files/6b57fdd76db1cd46d20471784a52e845/rexipuwamusadedozubibidi.pdfIn PDF document text
    • https://abril.pe/wp-content/plugins/super-forms/uploads/php/files/a5aitbra2946n5lgg8imtk2pt5/98214663116.pdfIn PDF document text
    • https://www.pal-kont.hu/wp-content/plugins/super-forms/uploads/php/files/12809aa84150e09f3cb19d485b28ce8b/65799849652.pdfIn PDF document text
    • http://accessiblevehicleservices.com/userfiles/file/gegovetunutamo.pdfIn PDF document text
    • https://dagvandearchitectuur.be/_files/file/jojonitofi.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/70fdb4f25014e2ee55422ae2ddfa4e03/22402182353.pdfIn PDF document text
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5a8ae7544f---41296792114.pdfIn PDF document text
    • http://alpanelektrik.com/depo/sayfaresim/file/6565276076.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=countdown+till+8pmPDF 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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e113.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE113 17584 bytes
SHA-256: fb462b8fbd87bb29bc29a43c7de989ab6900b064b1115e5bad5478d08c7c376e
font_01_sfnt_off00010f64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F64 10416 bytes
SHA-256: 970569b233ccafc005560a64c1e845364a27eeee0641142b36685b5050a4fec5
font_02_sfnt_off00012701.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12701 16880 bytes
SHA-256: 27bd195050b4d24026df5dd70f17fba310a47fa35ee707e4447ddd39f5fae88a
font_03_sfnt_off00013e97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E97 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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