Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9519cb5b4759ba9…

MALICIOUS

PDF

82.5 KB Created: 2021-08-14 23:15:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 4980844f12122cafd1d99dfddc78ad9e SHA-1: 90eb73e420380786bc5dd50e2a77594004b7face SHA-256: e9519cb5b4759ba9ea29fbde37ad5e8037cc757cba70e4d6adcdf440eabed3cc
256 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File T1059.007 JavaScript

The PDF document exhibits multiple high-risk lures, including prompts for remote support tools and MFA code harvesting, strongly suggesting a phishing or credential theft attempt. The presence of numerous links to potentially compromised WordPress sites and the ML classifier's high confidence score further support its malicious nature. While no scripts were directly extracted, the document's structure and embedded URLs point towards a sophisticated phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 9

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://pavcargo.ru/wp-content/plugins/super-forms/uploads/php/files/f98cf92e046daba22d0dcceef0faa7e7/17719552373.pdf In PDF document text
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/160750a5a6a087---xekuwipedivo.pdfIn PDF document text
    • https://brahmagnanam.org/fck_uploads/file/19785173125.pdfIn PDF document text
    • http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1610d98aa3a308---kodoxujoxeguka.pdfIn PDF document text
    • https://islandsvefir.is/wp-content/plugins/super-forms/uploads/php/files/c4q289b20mo50jtk8fn0chgulm/78126798226.pdfIn PDF document text
    • https://livstyle.ro/home/livstyle/public_html/uploads/files/60120943113.pdfIn PDF document text
    • https://www.tctnanotech.com/wp-content/plugins/super-forms/uploads/php/files/63200c19f77bd8bcd3f091f187f5e4f7/14995419962.pdfIn PDF document text
    • https://nicosiacaffe.it/file/79879422581.pdfIn PDF document text
    • https://cortopolis.ar/userfiles/file/61384098460.pdfIn PDF document text
    • http://szintai.hu/ckfinder/userfiles/files/lafosezuri.pdfIn PDF document text
    • https://rhdplumbing.com/wp-content/plugins/super-forms/uploads/php/files/9b8ed7c3b5354fa100e08ab632c2cff6/razemuxusosijuwuxodejoj.pdfIn PDF document text
    • https://hijaulumut.com/contents//files/63249471197.pdfIn PDF document text
    • http://pvsystexperts.com/wp-content/plugins/super-forms/uploads/php/files/4o7m28h527s6eikc6sd376lke7/15296966196.pdfIn PDF document text
    • https://k9-warrior.com/wp-content/plugins/super-forms/uploads/php/files/6gna3tfk1tfkff7bnp6e4f2p2k/pejelubuxemoku.pdfIn PDF document text
    • https://regenerativetherapyforpain.com/wp-content/plugins/super-forms/uploads/php/files/6613d4990cb1470f09cc540b8b15f782/fazufutip.pdfIn PDF document text
    • https://suacuacuontoanphat.com/upload/files/91656509183.pdfIn PDF document text
    • http://berallebags.com/UploadFiles/FCKeditor/20210507015242.pdfIn PDF document text
    • https://www.syah.org/wp-content/plugins/super-forms/uploads/php/files/2bc4fb8cb3a6528c14cb5eb59b613782/runufidazi.pdfIn PDF document text
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/9d6029674a5999eed761e726100ae432/83380880158.pdfIn PDF document text
    • http://www.hgbehringer.de/img/files/files/gutatodewilot.pdfIn PDF document text
    • https://xn-----6kcabagcgfjsxjciriy6alkh6a7aqk.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/0cfa52bd29280678e45c1045a8398140/merutesimaguxe.pdfIn PDF document text
    • http://alkanboya.com/files/file///nosuloniwagakusake.pdfIn PDF document text
    • https://malashealthcare.com/userfiles/files/89175677920.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=how+to+enable+2fa+on+epic+games+launcherPDF 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_off0000dcd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCD5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f4ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4EC 11364 bytes
SHA-256: f7a60d60b270600d1b23d320ff8a74cc7c871cdce545937638f3c3b216897012
font_02_sfnt_off00010f54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F54 16868 bytes
SHA-256: 30301bebaf6988772c1b2eabef6b3d0a0458854669fb6efe274995a115daa6a0

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