Malicious PDF — malware analysis report

Static analysis result for SHA-256 adce3ecabfe19699…

MALICIOUS

PDF

80.2 KB Created: 2021-09-08 02:57:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 7ef7099a97af284a46a689db6c622815 SHA-1: a345795beb0bca9817cc8f410ba0bf9f521ebc83 SHA-256: adce3ecabfe196995c04a00c544c67779ba11e037647a5cf857c2e0f588078d9
196 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document was flagged by a machine learning classifier as malicious and by ClamAV as a phishing trojan. The heuristics indicate it functions as a link farm, directing users to various compromised or disposable hosting sites. Notably, a 'Clipboard command execution lure' heuristic fired, suggesting the document instructs users to copy and paste content into a shell, a common technique for executing malicious payloads. The presence of numerous external URLs indicates a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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 https://krisoc.ru/uplcv?utm_term=dymo+label+maker+d1+manual PDF link annotation
    • http://movediary.com/userfiles/file/sijojuke.pdfIn PDF document text
    • http://nemeckystrakac.sk/editor_uploads/files/gukisevorebulapasumelep.pdfIn PDF document text
    • https://livingcircles.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160cdc8cf28fb9---tebegi.pdfIn PDF document text
    • http://xsteelstock.com/d/files/52200235945.pdfIn PDF document text
    • https://enville.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084c077c1957---jewuzibizorur.pdfIn PDF document text
    • https://diaochue.vn/userfiles/file/14080200469.pdfIn PDF document text
    • http://megalabsrl.it/userfiles/files/nawimotutojib.pdfIn PDF document text
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/a3e0ffa495baff722f86e861aa6df434/mejupajopopedulukewamu.pdfIn PDF document text
    • https://amursvoidom.ru/media/files/47255372817.pdfIn PDF document text
    • https://ip-pharma.net/data/files/37734122457.pdfIn PDF document text
    • http://bbu.vn/Images_upload/files/59618895985.pdfIn PDF document text
    • https://www.mobytec.com.br/mobytec/wp-content/plugins/formcraft/file-upload/server/content/files/1608d783f89e82---16107220520.pdfIn PDF document text
    • http://chira-med.pl/pliki/ziwug.pdfIn PDF document text
    • http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b8314c49ddf---vunaxozejofaw.pdfIn PDF document text
    • http://a1climbing.com/userfiles/files/morunag.pdfIn PDF document text
    • http://studiopol.it/userfiles/files/rufadakaxo.pdfIn PDF document text
    • https://drlanda.hu/user/file/godimimurilozaxupapalu.pdfIn PDF document text
    • https://www.hdcorp.com.br/wp-content/plugins/super-forms/uploads/php/files/hl7h1tfkjg51hehvg5sbos7ht2/78280534721.pdfIn PDF document text
    • http://redwoodpwr.com/wp-content/plugins/super-forms/uploads/php/files/lds2to5vvi5e6scrp249n8rtc5/4469371793.pdfIn PDF document text
    • http://adabaskimerkezi.com/upload/file/fupinanenivozolizosix.pdfIn PDF document text
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606f1c33f0199---jozunotezanesomivagibax.pdfIn PDF document text
    • http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160701c9c26717---75466921280.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d2b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2B4 18280 bytes
SHA-256: 6b04a79198b6ccec5ffdb21079d81c316d12e8289d1e0274960320e3e394b56d
font_01_sfnt_off00010251.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10251 10552 bytes
SHA-256: e1ada24185fcfd7654a838651c8b6ed0b63a0251ecbd629d60050c29e1045c66
font_02_sfnt_off00011a61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A61 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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