Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac95250026a100c3…

MALICIOUS

PDF

84.9 KB Created: 2021-09-10 12:10:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 46ffcbba33d0e3b1dac79587aaacbfc9 SHA-1: 7e053498cb54bfc4bff66f4a7dd0877cc6f018aa SHA-256: ac95250026a100c38a7002ca42c757251152cb71fe5c0b76ccae94debc1ca6a9
236 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File T1059.001 PowerShell

This PDF document employs a ClickFix social engineering tactic, instructing the user to copy and paste commands into a terminal to bypass security measures. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to download and execute a second-stage payload. The document also contains numerous links to potentially compromised websites and disposable hosting, suggesting a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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://queure.ru/uplcv?utm_term=cara+buka+website+yang+diblokir+di+android PDF link annotation
    • http://etkindenetim.com/resimler/files/dorumipirurafef.pdfIn PDF document text
    • https://thehouseconcert.com/ckfinder/userfiles/files/bipixexoginu.pdfIn PDF document text
    • http://gsnursing.in/ckeditor/ckfinder/userfiles/files/worijevixanezamita.pdfIn PDF document text
    • https://newline-eg.com/userfiles/file/pemazolarowomekozifeka.pdfIn PDF document text
    • http://casaledellasignora.it/userfiles/files/galom.pdfIn PDF document text
    • http://nguyenthaotech.com/upload/files/53023464291.pdfIn PDF document text
    • http://kibbkw.com/uploads/file/90433870618.pdfIn PDF document text
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/161330914e8eab---60666035262.pdfIn PDF document text
    • http://professional-tuner.at/uploaded/file/18489831642.pdfIn PDF document text
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612e9cef95dea---jajatuwizigejolewariwo.pdfIn PDF document text
    • http://cnc-soustruzeni.cz/files/file/39965103385.pdfIn PDF document text
    • http://freeorden.com/media/file/mamesudodezedirajaw.pdfIn PDF document text
    • http://apvn.info/userfiles/file/pepexijutexufula.pdfIn PDF document text
    • https://padservhosting.com/userfiles/file/78516916489.pdfIn PDF document text
    • https://partroyfuneralhome.com/partroy/assets/file/puwilexonowido.pdfIn PDF document text
    • http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613166480d46c---58850321894.pdfIn PDF document text
    • http://sea-cruise.ru/ckfinder/userfiles/files/29443525628.pdfIn PDF document text
    • http://szyldkj.com/luodan/images/userfiles/file/71495536322.pdfIn PDF document text
    • https://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/1005011100f5cd6322ad106e82f9ebee/bugadirowuwakozajanum.pdfIn PDF document text
    • http://xn--12cmi2byac9cdhd0hra6d7bxkwbgj1gch.com/user_img/files/fonofinusofuzinuvuzit.pdfIn PDF document text
    • http://distant-property.ru/fck_editor_files/files/43183347876.pdfIn PDF document text
    • http://espacioschillout.es/images/admin/file/43193618597.pdfIn PDF document text
    • http://artikos.pl/userfiles/file/kupukaluzumatox.pdfIn PDF document text
    • http://indyskischool.com/ckfinder/userfiles/files/30429761260.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_off0000e830.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE830 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010042.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10042 16856 bytes
SHA-256: 90c7fbdd8f725dcf21c6146948107483a3971f0ee7cded3c7781e126eca0863f
font_02_sfnt_off00012c33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C33 10984 bytes
SHA-256: 0369e109a7ddf9d0ad34df893bf5b5eb3b3549cc11cf6430628f88b8becfb3fd

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