Malicious PDF — malware analysis report

Static analysis result for SHA-256 051d5d71b69fd6de…

MALICIOUS

PDF

79.2 KB Created: 2021-09-16 16:13:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 412761157a4ceef36fc700c0536977a9 SHA-1: ef722c7794bdb55a83ab1c29ce1641ca6b24066a SHA-256: 051d5d71b69fd6de97fb3a0e3776be82cd79e4c941dec4621afa58c8b44b144c
196 Risk Score

Malware Insights

MITRE ATT&CK
T1059 Command and Scripting Interpreter T1566.001 Spearphishing Attachment

The sample is identified as malicious by ML classifiers and ClamAV. A critical heuristic indicates a 'Clipboard command execution lure,' suggesting the document instructs users to copy and paste content into a shell, a common technique for executing malicious commands. The presence of numerous external URLs, many pointing to disposable hosting or compromised CMS uploads, further supports a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://zezoalza.com/ckupload/files/8353231992.pdf In PDF document text
    • https://hanedantoptan.com/upload/files/kelajazabek.pdfIn PDF document text
    • http://mtreurope.com/ckfinder/userfiles/files/wuvijulepuvojuzuner.pdfIn PDF document text
    • http://lycee-elm.info/userfiles/file/19413377363.pdfIn PDF document text
    • https://wanfutemple.urwaydesign.com/data/file/userfiles/files/12281312104.pdfIn PDF document text
    • http://prinsart.ro/uploads/files/36098053608.pdfIn PDF document text
    • http://bbhshipyard.com/userfiles/file/jogiloluluweg.pdfIn PDF document text
    • http://agisma.ru/files/pages/files/73810015355.pdfIn PDF document text
    • http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1613fe85b5a6ec---xafinabaki.pdfIn PDF document text
    • http://hndgyl.com/v15/Upload/file/20219101736392319.pdfIn PDF document text
    • http://secretinvitation.net/images/files/bevesujevenagugodobotivi.pdfIn PDF document text
    • http://odontoflash.eu/userfiles/files/buromirenimaraziravigikax.pdfIn PDF document text
    • http://joyearland.com/ckfinder/userfiles/files/16187050085.pdfIn PDF document text
    • https://movie2book.com/userfiles/file/31955399255.pdfIn PDF document text
    • http://kevinmcallisterlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/31905162227.pdfIn PDF document text
    • https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1612ff1cd7fd78---vixojen.pdfIn PDF document text
    • http://babijie.com/upload_fck/file/2021-9-16/20210916140306983386.pdfIn PDF document text
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/161422843afd8a---lofetewudokisebovina.pdfIn PDF document text
    • http://mrhobbscoffee.com/images/uploads/file/5957554241.pdfIn PDF document text
    • http://bukharaalpharetta.com/sites/default/files/file/dazijabujukiberovofu.pdfIn PDF document text
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/c17e09d7727bce729e7b4962b4a45904/kefagumasokodok.pdfIn PDF document text
    • https://www.ayersworthglen.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614165ebac8e3---neforate.pdfIn PDF document text
    • https://tahitotfalu.hu/ckfinder/userfiles/files/56056205960.pdfIn PDF document text
    • http://shopabrang.com/images/files/gotapusufusomuvoduzib.pdfIn PDF document text
    • http://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140e1ad1b2de---nevog.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=my+contacts+apkPDF 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_off0000d09f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD09F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e8b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8B1 18220 bytes
SHA-256: 0467689aaee67a38c69a3596113d81af244cad43c67874810d1f191d208b154f
font_02_sfnt_off0001184d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1184D 10196 bytes
SHA-256: 711906de833d72d898c5307d67d87638f31d616cc52196c5b9755c693526f7c4

Open this report in the interactive analyzer, or submit your own file for analysis.