Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2b544ac66fa7180…

MALICIOUS

PDF

110.5 KB Created: 2021-09-01 12:01:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: a299263c2af5a127423d62f33d2d7caa SHA-1: 2bf214e96cfdcd85aeeb3459546a2848d156c002 SHA-256: b2b544ac66fa718082c8793ecf00d9b12e5cbd48e6bc0c6107d782ead2a26cbb
204 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and multiple external URIs, many of which point to compromised CMS upload storage or disposable hosting, suggesting a phishing or malware distribution attempt. The 'SE_CLIPBOARD_COMMAND_LURE' heuristic indicates the document likely instructs the user to copy and paste commands into a shell, a common tactic for executing downloaded payloads. The ML classifier and ClamAV detection strongly support a malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9935

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://garglob.ru/uplcv?utm_term=fingers+crossed+meaning+in+kannada PDF link annotation
    • https://lamaisonducoeur.ca/upload/editor/file/12035717111.pdfIn PDF document text
    • http://technoauto.jp/js/upload/files/dadogepodel.pdfIn PDF document text
    • http://nowyhotelik.pl/userfiles/file/watafulutofuranaxo.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/lf1npektqr6vrnj3jeb71jpel7/govezuwakutenejujimajo.pdfIn PDF document text
    • http://uk-finansist.ru/userfiles/file/vitapibinuwumeriguvep.pdfIn PDF document text
    • https://puppometalli.eu/file/79950166876.pdfIn PDF document text
    • http://sevimticaret.net/userfiles/file/fivijitaxivaniroluw.pdfIn PDF document text
    • https://likeevent.it/writable/public/userfiles/file/13891364545.pdfIn PDF document text
    • https://brune-schmuckwerk.de/ckfinder/userfiles/files/rexuxopeteje.pdfIn PDF document text
    • https://armagedonspedycja.pl/files/file/sunomekapupud.pdfIn PDF document text
    • https://www.d-table.com/wp-content/plugins/super-forms/uploads/php/files/d5b833e62c2273824107b78176b0b4df/23812382599.pdfIn PDF document text
    • https://tiklatakip.com/calisma2/files/uploads/bopujosawosu.pdfIn PDF document text
    • http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/160793ed197a86---49787826049.pdfIn PDF document text
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/160b98c1891f9c---gukuxabeturel.pdfIn PDF document text
    • http://dataprint.ie/uploads/file/renilefipej.pdfIn PDF document text
    • http://pchs1967.com/clients/b/b3/b38b0c0be7ceca4b309dcb684d78a7c5/File/16031752575.pdfIn PDF document text
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610053e5e77be---rodeki.pdfIn PDF document text
    • https://puertoestereo.com/wp-content/plugins/super-forms/uploads/php/files/230kfet9kbd8mrohftfrnn6ivf/28603701267.pdfIn PDF document text
    • http://www.photonics-science.com/ckfinder/userfiles/files/romutawi.pdfIn PDF document text
    • https://www.guestquesttravelmedia.com/wp-content/plugins/super-forms/uploads/php/files/n6rckq6n7gt9dl6mnq5foif9i3/juxefodusurusitutugiz.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000115f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115F1 16164 bytes
SHA-256: a0f26d9ec2bc0bbc84dfb8c1a224a49f7f70479ac92e21d726acd811d43f3bd1
font_01_sfnt_off00012b92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B92 27816 bytes
SHA-256: 23206dfe8c95f0ed3ba0159eea3a9d4da9f58460940c6be25c8eea4387690576
font_02_sfnt_off0001714c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1714C 10636 bytes
SHA-256: 342f6fb843588672c382686e32daa1430fcdb66b215033d1113e46d5cd85cb51
font_03_sfnt_off00018960.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18960 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_04_sfnt_off0001a16d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A16D 1888 bytes
SHA-256: 228445a3744f13af4bf84041e55802a923554d86926eb0745489ea117e4ab105

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