Malicious PDF — malware analysis report

Static analysis result for SHA-256 dad8c37933754875…

MALICIOUS

PDF

97.0 KB Created: 2021-06-26 08:48:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 9faa1c070abb4ad582bf5e0c2345923e SHA-1: 97d46d090742efbf6a9b69f567c3f921703fbbc1 SHA-256: dad8c37933754875cd3955c835517c6857d0cec31b339d4b212c38a75b814360
204 Risk Score

Malware Insights

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

This PDF file exhibits multiple indicators of malicious activity, including links to compromised CMS uploads and disposable hosting, suggesting an attempt to host malicious content. The presence of a 'download button' lure further supports a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate this PDF is designed to deliver a second-stage payload, likely via embedded JavaScript, to the user.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9902

Heuristics 8

  • 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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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 http://czechdidgeridoo.com/admin/upload/file/wezil.pdf In PDF document text
    • http://jagatjyotischool.org/jagatjyotischool/userfiles/file/kuxos.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/52612741576.pdfIn PDF document text
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/16077d91781937---1754373224.pdfIn PDF document text
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16070477727969---3043617293.pdfIn PDF document text
    • https://www.chartsunlimited.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/160826b19bc8cc---35105618913.pdfIn PDF document text
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070b6490a221---xibafefexugawad.pdfIn PDF document text
    • https://vashadvokat82.ru/wp-content/plugins/super-forms/uploads/php/files/ef06a885d9f3433acceb56731d87e161/lumoji.pdfIn PDF document text
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e3c7a25f45---mobigebinovirifabaxet.pdfIn PDF document text
    • https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a733e9e0c13---7880651350.pdfIn PDF document text
    • http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/ffee979f278d58e9d53a7156e64c113f/77900233685.pdfIn PDF document text
    • https://polinagerz.ru/wp-content/plugins/super-forms/uploads/php/files/72nhd0ocd60k8bqe9nqrrdo1ds/ditato.pdfIn PDF document text
    • http://donauwell.at/userfiles/file/juzokunek.pdfIn PDF document text
    • http://nhactheducthammy.com/upload/files/gopetorageg.pdfIn PDF document text
    • https://kindliving.org/wp-content/plugins/super-forms/uploads/php/files/tmp/vimududu.pdfIn PDF document text
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1cfe589fc5---fobitejetenafufirukajuzo.pdfIn PDF document text
    • https://iamtimeshare.com/userfiles/file/wijiwudifejekojodu.pdfIn PDF document text
    • https://samsungvrvklima.com/upload/ckfinder/files/41404944123.pdfIn PDF document text
    • http://timandlor.com/userfiles/file/lekirijidakelisexunedewi.pdfIn PDF document text
    • http://artistalexanderkanevskyroyalshakespeareglobetheatrelondon.com/clientMedia/file/69290449573.pdfIn PDF document text
    • https://rrvchefs.com/wp-content/plugins/super-forms/uploads/php/files/7cc4d2e6bf3d618e303092f59e978f47/93705131546.pdfIn PDF document text
    • https://serka.com/serka/upload/files/19679279702.pdfIn PDF document text
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/1608c2287b63ac---pefiruvojejefi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=karl+anthony+towns+and+joel+embiidPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fc3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC3C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011453.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11453 10972 bytes
SHA-256: e67b77fd6760ceb5eec800e092d7e0f82440c5c697e1906a6f299760fa6c284c
font_02_sfnt_off00012d9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D9B 19872 bytes
SHA-256: 2f5951963d2568eb95ca1e3e8eb84235cfce38ea6076458c757ab976714f03e0
font_03_sfnt_off00015fc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15FC0 16484 bytes
SHA-256: 64794009602ac6320d6f342430cb293439fbf1283c26b0c70b0cabe2bef15953

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