Malicious PDF — malware analysis report

Static analysis result for SHA-256 b74aa70c0d4a01a0…

MALICIOUS

PDF

90.6 KB Created: 2021-07-02 17:58:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: ea04b6147ee4c1761d504228aba20bdb SHA-1: b4d14430e4087fd13db8289bf1765d9da8966101 SHA-256: b74aa70c0d4a01a04e4ed619e86392c118f7b3840637e439bd29960c389ff6b1
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised WordPress sites, indicating it's designed to redirect users to malicious content. ClamAV detection and ML classification strongly suggest malicious intent, likely for phishing or malware delivery. The embedded URLs and link farm structure are key indicators of this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

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://www.quatainvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b3c8f373419---31317212054.pdf In PDF document text
    • https://www.lightingsolutionsal.com/wp-content/plugins/super-forms/uploads/php/files/8da28d7cca50994ba713ef6cfc833680/kedukutelegogeg.pdfIn PDF document text
    • https://citronixdeflection.com/nbloom/fckuploads/file/15269177166.pdfIn PDF document text
    • http://www.veronicaneal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/160a8ecb784bcd---vusanavumelujomav.pdfIn PDF document text
    • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160700cc9c1cc5---towubawudajizonumevekev.pdfIn PDF document text
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/16097dc114df7d---bolipugezivibafor.pdfIn PDF document text
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a13d5396c0f---12823581188.pdfIn PDF document text
    • https://www.swissfillon.com/wp-content/plugins/super-forms/uploads/php/files/6ac52baae5ea84c40a06c13d614cf1ee/rifikunovosolawabuvebezum.pdfIn PDF document text
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1c5e5a54fe---duxin.pdfIn PDF document text
    • http://kolaykanal.com/userfiles/files/23391265989.pdfIn PDF document text
    • https://villatoscana-pi.it/userfiles/file/27989435940.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/h4qq3q6rvdd8ldfekhqkke874f/wabetuzepinenugekijuduf.pdfIn PDF document text
    • https://laser-arena.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1608cff87eccf5---sonivagu.pdfIn PDF document text
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/160982c32b5f60---87384970600.pdfIn PDF document text
    • http://www.korayozelguvenlik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c27e8834c5---49043405856.pdfIn PDF document text
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/1608d377f7157e---mirazuwinolivakavadopufox.pdfIn PDF document text
    • http://cuacongtudongbinhduong.com/upload/files/xopinakexoxipiguku.pdfIn PDF document text
    • https://shrmivirtual.org/wp-content/plugins/super-forms/uploads/php/files/07d68383ae090e7cd31c4a33d0f8c2f4/7653440103.pdfIn PDF document text
    • https://www.lamuccacompany.com/wp-content/plugins/super-forms/uploads/php/files/e5e447cfcb93fae5cf1c06f75a4fc261/nexatotetu.pdfIn PDF document text
    • https://elitteaccesorios.com/wp-content/plugins/super-forms/uploads/php/files/6u82j8oebdtbrvq2mu409mksk0/ruzomuwotezatobofo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=persona+5+chariotPDF 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_off0000e7b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7B9 16396 bytes
SHA-256: b7167d829de35595304f1dc60e1a0edfeb1e616176f2fef477d818d59702dc3c
font_01_sfnt_off0000fe3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE3E 18756 bytes
SHA-256: e5f6b8ac24cc6920310bc3c3f504fe3be7d3992767aee0d1aeecd3ac4452c0c0
font_02_sfnt_off00012d7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D7A 10416 bytes
SHA-256: a125feae8f14ee4dc22059e2f51bc486405c88640c0a2ccf79a26d27b1ca730d
font_03_sfnt_off0001451b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1451B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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