Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8939e89c09eece9…

MALICIOUS

PDF

86.7 KB Created: 2021-06-28 21:05:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: a626148cd1e76150d843a9dc884fbce1 SHA-1: c3e66cbc70417a33faa9e63391207fc12ed39573 SHA-256: d8939e89c09eece94b688a7ccb08215825230a7d797a563c1dde01f38fb07626
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a link farm with numerous URLs pointing to compromised CMS upload storage and disposable hosting, suggesting an attempt to redirect users to malicious sites. The presence of external URIs and the overall structure indicate a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9848

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://philabc.ru/uplcv?utm_term=ionic+and+covalent+compounds+difference PDF link annotation
    • https://www.diktu.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093e7e71192d---24767811498.pdfIn PDF document text
    • https://www.sir.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16089b49c7e0ee---39572707585.pdfIn PDF document text
    • https://mkontakt.pl/dat//file/jezusagel.pdfIn PDF document text
    • http://www.adatechotomasyon.net/wp-content/plugins/formcraft/file-upload/server/content/files/160ba5107ee286---61209560211.pdfIn PDF document text
    • http://home-delighted.com/user_img/files/fixukuzunizibas.pdfIn PDF document text
    • http://fw-simple.com/uploads/files/20758856069.pdfIn PDF document text
    • https://n95america.com/wp-content/plugins/super-forms/uploads/php/files/83a413c6b12124657791a5d72bba6d45/71579782380.pdfIn PDF document text
    • https://auto-rujo.com/images-editor/file/vidasudolofide.pdfIn PDF document text
    • http://akicgiyim.com/userfiles/file/difekamutog.pdfIn PDF document text
    • http://thanhlamresort.vn/wp-content/plugins/formcraft/file-upload/server/content/files/16070262497efb---dotagaginafavikiguwe.pdfIn PDF document text
    • http://99hospitalitygroup.com/ckfinder/userfiles/files/buleguxulazugip.pdfIn PDF document text
    • http://www.asslar.de/downloads/11724344240.pdfIn PDF document text
    • https://prokoncept.hu/admin/blogfck/image/file/duwemadubuzakaz.pdfIn PDF document text
    • http://cocoal.com/uploads/file/20517653246.pdfIn PDF document text
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160bce098bcace---83493246843.pdfIn PDF document text
    • https://rclurie.com/wp-content/plugins/super-forms/uploads/php/files/b80da99ae0197ba3ca1916093f946d9c/95908933116.pdfIn PDF document text
    • https://www.focus.mu/wp-content/plugins/super-forms/uploads/php/files/59b04a712b238bb07cce9a9ebe3bbd72/kedebev.pdfIn PDF document text
    • https://epiphanych.com/images/file/81867459043.pdfIn PDF document text
    • https://humanistbeauty.com/wp-content/plugins/super-forms/uploads/php/files/l3pvs9es1q44jktk5o4fd7cdem/monoxavifeneba.pdfIn PDF document text
    • https://www.tangelo.no/wp-content/plugins/formcraft/file-upload/server/content/files/16096b33c2b05a---tofivi.pdfIn PDF document text
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/53e2f1fda86fb16e9464fd3525db442a/2650569405.pdfIn PDF document text
    • http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/160877d3410eea---33531115606.pdfIn PDF document text
    • http://tillmanfamilyreunion.com/clients/b/b7/b7385abc5988d1ee605fea7695e3d00e/File/givenop.pdfIn PDF document text
    • http://colorfulmedia.de/fotki/fotki/file/39596815268.pdfIn PDF document text
    • http://aliglobshop.com/userfiles/file/83064186772.pdfIn PDF document text
    • http://phuocthuan.vn/images/pic/file/83587026679.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_off0000f033.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF033 10896 bytes
SHA-256: 594617f1ea374e99d353d36393dc7dfce711622ca4af3156f8d152e02ed6adc4
font_01_sfnt_off0001096b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1096B 16812 bytes
SHA-256: 01fa721f2e73bd350695585b7985abaf7c07d63575cb8f062443a0930c771a55
font_02_sfnt_off00013520.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13520 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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