Malicious PDF — malware analysis report

Static analysis result for SHA-256 1415988e86ac0b99…

MALICIOUS

PDF

84.6 KB Created: 2021-07-09 21:13:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: a06d06593008b7b76d8209efa31a8fe1 SHA-1: c4374dc2017e81cfd149ae09ed00888f0d74503e SHA-256: 1415988e86ac0b997fc489f1a912038a44ae7b9555a231aa6b06be4d23c0e35f
196 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1566.001 Spearphishing Attachment

The sample was detected as a malicious PDF by ClamAV and an ML classifier. It contains a 'clipboard command execution lure' heuristic, indicating it instructs the user to copy and paste commands into a shell, a common technique for executing secondary payloads. Multiple URLs were extracted, some pointing to compromised CMS uploads and disposable hosting, suggesting a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

Heuristics 7

  • 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
  • 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 http://timebank.ru/sites/default/files/photos/pagefile/36276324683.pdf In PDF document text
    • https://nevisnews.com/userfiles/gofit.pdfIn PDF document text
    • https://dacinsara.ro/fckfiles/file/67925492641.pdfIn PDF document text
    • https://elitteaccesorios.com/wp-content/plugins/super-forms/uploads/php/files/5sgv5cvglojr1vn8ple2amork8/84512348882.pdfIn PDF document text
    • http://pincailight.com/zk/UploadFile/file/2021062215474873499.pdfIn PDF document text
    • https://contabil-fiscal.ro/mm/file/fexifafo.pdfIn PDF document text
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/160c1bd72892e7---49140222064.pdfIn PDF document text
    • http://artospace.com/pics/file/74049249048.pdfIn PDF document text
    • https://menu2uplus.com/images/file/zutuda.pdfIn PDF document text
    • https://rclurie.com/wp-content/plugins/super-forms/uploads/php/files/64c8beb047c5bbc6caa88c23c50ec750/kedevujagewozanedonimena.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/410570444da4be3bba4e2c5acb136a7b/nawami.pdfIn PDF document text
    • https://advantagelic.com/singhania/downloads/file/jawuwibusexes.pdfIn PDF document text
    • https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609efddee2ba4---4538419732.pdfIn PDF document text
    • https://encouragingmath.com/wp-content/plugins/super-forms/uploads/php/files/2756a4cca2129348699753c2d3d8f9ca/28199554589.pdfIn PDF document text
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c235951a882---jalojotoda.pdfIn PDF document text
    • https://earplighting.com/wp-content/plugins/super-forms/uploads/php/files/5789443752d9253c4c2761b74bddd3d4/lejefekiwunetajijis.pdfIn PDF document text
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c87cce095fb---nuraral.pdfIn PDF document text
    • https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/1609fdecc20414---78250595215.pdfIn PDF document text
    • https://ewms.vn/wp-content/plugins/super-forms/uploads/php/files/ic8doieh3tnluhfrklgqgefhqi/69311095797.pdfIn PDF document text
    • http://ztkammer.at/uploads/file/dapukufajesirado.pdfIn PDF document text
    • http://amuseonline.com/absite/userfiles/file/fapux.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=french+texts+for+beginnersPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e78f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE78F 17364 bytes
SHA-256: bc810709dc7c20f1b111593c0b8640523c746f6a61aa0058b57f1906a1cdf9b1
font_01_sfnt_off0001151c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1151C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012d33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D33 10628 bytes
SHA-256: e3040ca405adbe618c34735e11d901a3d64712540a0fe8e2aefaebc2ffc229ad

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