Malicious PDF — malware analysis report

Static analysis result for SHA-256 46f7ea66caf37f9f…

MALICIOUS

PDF

89.9 KB Created: 2021-06-30 19:31:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 47091c571d47cee74e0d62af408b818b SHA-1: eadf51c96d53bde127a93782901c1fefcc4482ca SHA-256: 46f7ea66caf37f9f2536ded05f1f3b2bdf67a01e4fe2098e77a231575e241668
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was identified as malicious by multiple heuristics and a machine learning classifier, with ClamAV detecting it as a phishing trojan. The document functions as a link farm, containing numerous URLs that point to compromised WordPress sites and disposable hosting. These links likely serve to redirect users to malicious content, such as phishing pages or malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://nomylo.ru/uplcv?utm_term=elvis+presley+brothers+and+sisters PDF link annotation
    • https://www.llgnjinc.com/wp-content/plugins/super-forms/uploads/php/files/f06fc2733e795988241ba91d1101b2fd/61435516873.pdfIn PDF document text
    • https://www.c2commercial.com/wp-content/plugins/super-forms/uploads/php/files/19203413a6210c42412bfc5ad4a16e1c/noxetoxipuxigibuditage.pdfIn PDF document text
    • http://sosnovgeo.ru/userfiles/file/74373361029.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/d959226188a2997b5cf8b1e1f94a1017/44288612492.pdfIn PDF document text
    • https://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/6a582c7e88f27892e62576ca2494abd7/17203720530.pdfIn PDF document text
    • https://eitmedu.in/ckfinder/userfiles/files/fukurowaweral.pdfIn PDF document text
    • https://glowskincare.net/wp-content/plugins/super-forms/uploads/php/files/eec0e5f6fa20447af49635b2a8155811/risovudamamexiri.pdfIn PDF document text
    • https://bomberosdenavarra.com/userfiles_nexo/files/35120601323.pdfIn PDF document text
    • http://www.expertnutritionadvisor.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9c1370792---45534265160.pdfIn PDF document text
    • https://criteriacambio.com.br/wp-content/plugins/super-forms/uploads/php/files/eokhn23s7s59kri42m9k61qcjq/74643978397.pdfIn PDF document text
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/lmjmvc8glif9rsendmr7p3kdm7/90532680004.pdfIn PDF document text
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cd4e6bb4f9---ketid.pdfIn PDF document text
    • http://kayamedbursa.com/userfiles/file/12858885511.pdfIn PDF document text
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/160830bbf49ae8---83859763789.pdfIn PDF document text
    • http://suachuabaoduongmaynenkhi.com/img_quanganh/files/nakatedakawiruxoxoxurodo.pdfIn PDF document text
    • https://canvasations.com/wp-content/plugins/super-forms/uploads/php/files/eajmchso711tcdevmi9gpbn5o1/gujomamufupalepoja.pdfIn PDF document text
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d5049b7144---45867419671.pdfIn PDF document text
    • https://luyenthitoeic.info/userfiles/file/gafajariwimuji.pdfIn PDF document text
    • http://instandee.com/Images_upload/files/16283796021.pdfIn PDF document text
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bdeb911ef3e---patadekujuviworazovax.pdfIn PDF document text
    • https://parfumzone.ro/files/file/55587047429.pdfIn PDF document text
    • http://brodart01.com/wp-content/plugins/super-forms/uploads/php/files/tnl66rnjr9j5u5khcrc0eurk5s/malisupogov.pdfIn PDF document text
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1f9f86627a---gubariwe.pdfIn PDF document text
    • https://www.marvistasales.com/wp-content/plugins/super-forms/uploads/php/files/0634a17adf6ef1a57f2df278de01fe27/rovasuz.pdfIn PDF document text
    • http://szyldkj.com/luodan/images/userfiles/file/dajowukukejisopapavoxag.pdfIn PDF document text
    • https://securitydm.com/slicice/file/sidozefuwirejareza.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fe4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE4F 10792 bytes
SHA-256: 0a2df1589ec5c4475bf641ebadab23d13d45727ce96c1223672b0ef586fd0c66
font_01_sfnt_off000116e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116E3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012ef5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EF5 16612 bytes
SHA-256: a8b461e3ff03f0d821a0f9ae87b362c88bee519897e9c45313cff4e2aac5ccef