Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d55d438c010ce2c…

MALICIOUS

PDF

88.9 KB Created: 2021-07-03 06:17:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: bb51643f6f1a086a0904fba5f0a1a48e SHA-1: d8850addc230b434ee8f0e42b4481822d22e5c46 SHA-256: 7d55d438c010ce2c614ab345cee84f84bef43c5cdb6caeb8cd5172df87b6cb0c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. Heuristics indicate a high likelihood of phishing and malware, with ClamAV specifically identifying it as 'Pdf.Phishing.Trojan'. The presence of multiple external URIs and link farms points towards an attempt to distribute or host malicious payloads or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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://laborke.ru/uplcv?utm_term=bus+rush+game+download+for+pc PDF link annotation
    • https://www.propertyfilevault.com/wp-content/plugins/super-forms/uploads/php/files/c6cdf69f4636397ba84bb6873436da55/48625073550.pdfIn PDF document text
    • https://www.anandtirth.com/wp-content/plugins/super-forms/uploads/php/files/mpmnshl1bk0qnmbrrf3roi6de4/54294419502.pdfIn PDF document text
    • http://objetivovender.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aed5382398b---93065660177.pdfIn PDF document text
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16088b9d5be703---95053875724.pdfIn PDF document text
    • https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/kcafofhs0mtb3e54cpfegujrrf/lelivarutute.pdfIn PDF document text
    • https://www.officinadelgustoroma.com/wp-content/plugins/super-forms/uploads/php/files/6efc5b72269b003799df27a696fcfdbb/tapawawivov.pdfIn PDF document text
    • http://revucue.com/ckfinder/userfiles/files/79858724165.pdfIn PDF document text
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/160db5bfe1c6b5---10472137270.pdfIn PDF document text
    • http://pebyte.com/wp-content/plugins/super-forms/uploads/php/files/6a9me3e2lb4vr0flpqejs8nh3k/xekasuwurorabugir.pdfIn PDF document text
    • http://www.caribbeandentist.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ddad49b8ca1---16039495164.pdfIn PDF document text
    • https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/7budgvnk6ujsqgph9npg58fp3v/rapuzode.pdfIn PDF document text
    • http://ampletrekking.com/userfiles/file/gifutifuvetamizi.pdfIn PDF document text
    • http://omatsuri.kr/data/userfiles/files/zepud.pdfIn PDF document text
    • http://www.mondzorgvesa-voorschoten.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c8f97131ec6---weletanoxeloleta.pdfIn PDF document text
    • https://www.mysmilestudios.com/wp-content/plugins/super-forms/uploads/php/files/44700cec4f545a7b36d5d11b3d48026e/zuwuvabedejajepejelafa.pdfIn PDF document text
    • https://daluxerealty.com/wp-content/plugins/super-forms/uploads/php/files/mhcd48h0taesqc9pfd2jjt3v45/26947115063.pdfIn PDF document text
    • http://naasschoolofmotoring.ie/fckeditor/userfiles/file/23691684625.pdfIn PDF document text
    • https://lightupalife.org.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609ab21969620---jasifuroseza.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/19j8ejdk33oraj78rfglva5lo2/97017762066.pdfIn PDF document text
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0fe5fcba7a---nuvosetazazifitenugeris.pdfIn PDF document text
    • http://www.everhouse.lt/wp-content/plugins/formcraft/file-upload/server/content/files/160a57a78851c5---xegoxapulaj.pdfIn PDF document text
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a623f3cb1e---80317466212.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f7a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7A4 17420 bytes
SHA-256: 3da54cbd8a34e3375550dd88c5ca83b52b598b0906ff621b667553ceb1e02f24
font_01_sfnt_off000124df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124DF 11116 bytes
SHA-256: 9a6dfc7df677f5b8c42b95371043c2c5f7662fa0cc73a9ff27fe8ad1fdb5989d
font_02_sfnt_off00013e8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E8A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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