Malicious PDF — malware analysis report

Static analysis result for SHA-256 70570cab8f94e7de…

MALICIOUS

PDF

90.9 KB Created: 2021-09-07 14:33:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 57a455ace1b3f3410c790c35cb92414a SHA-1: 082c10b16a3e2b142a4fdd1168a291eb0083a48d SHA-256: 70570cab8f94e7de8d44f63dae8119b180cb7f8db394e90c7a25919df3937d73
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded JavaScript stream and numerous external URIs, many of which point to compromised or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The embedded JavaScript is likely responsible for redirecting users to these malicious URLs, potentially to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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
  • 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://archism.ru/uplcv?utm_term=notary+signing+agent+certification+study+guide+pdf PDF link annotation
    • http://coolscape.info/images/files/nopijogakijitivowaja.pdfIn PDF document text
    • http://dzbnf.com/upload/file///30917703061.pdfIn PDF document text
    • https://conexus-study-abroad-travel.com/ckfinder/userfiles/file/13334065635.pdfIn PDF document text
    • https://shining4u.com/wp-content/plugins/super-forms/uploads/php/files/ff0d166caf37efe2db3d0ba3582a0fe6/79281091807.pdfIn PDF document text
    • http://alexlunacoach.com/img/editor/file/99824592673.pdfIn PDF document text
    • https://www.bocamvigliesrooms.com/wp-content/plugins/super-forms/uploads/php/files/12538e65633118cb3b8b56b4c72e5d7b/galomurexekenizi.pdfIn PDF document text
    • https://aawyx.com/sites/default/imageuser/file/75156242563.pdfIn PDF document text
    • https://zebcom.in/userfiles/file/57828823206.pdfIn PDF document text
    • https://lbk-ingatlan.hu/uploads/file/33173748952.pdfIn PDF document text
    • http://blissworldbeauty.com/newerac2c/userfiles/file/93962725391.pdfIn PDF document text
    • https://broadstripe.com/wp-content/plugins/super-forms/uploads/php/files/7104c24e4f8a9459607ac16917421ab6/70867539573.pdfIn PDF document text
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/1611e9c4ba0518---noxuwowadasizavodade.pdfIn PDF document text
    • https://soechi.id/userfiles/file/23192476857.pdfIn PDF document text
    • https://www.barefoothoa.com/webroot/js/ckfinder/userfiles/files/rejilamosemi.pdfIn PDF document text
    • http://sportingclubalbinia.eu/userfiles/files/61457752980.pdfIn PDF document text
    • https://warungmimpishio.com/contents//files/kemetod.pdfIn PDF document text
    • http://wildpflanzen-planung.de/file/fufuwutez.pdfIn PDF document text
    • http://beiwendq.com//data/attachment/file/tuduvamoluvezulezifulo.pdfIn PDF document text
    • https://www.keystonecare.co.uk/wp-content/plugins/super-forms/uploads/php/files/3f47b0cda27cd6ac4b51adf9c0f0f81c/76965048249.pdfIn PDF document text
    • http://allnatureint.com/userfiles/file/gafewese.pdfIn PDF document text
    • https://www.sacda.org/wp-content/plugins/super-forms/uploads/php/files/6opfb8g696cal018l6vi33coo7/mewejoweladabibixagadira.pdfIn PDF document text
    • http://hysansam.com/fckeditor/userfiles/image/6895238372.pdfIn PDF document text
    • http://haumeaonline.com/userfiles/file/kepexegikejozoniwefagilu.pdfIn PDF document text
    • http://print-printonline.com/ckfinder/userfiles/files/dexefidikijuwafedizikiwud.pdfIn PDF document text
    • http://www.klpreschool.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3e70fd1324---lisawetozofodow.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_off0000f7b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7B2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010fc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FC4 20088 bytes
SHA-256: 48e16e536fff3a1ecbfebda044d679b470c0d7d35efa585c4a1e70fa009df8f8
font_02_sfnt_off000143e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x143E0 10940 bytes
SHA-256: ff243a6bc9d91afbf0b05529c2a6e4d8cb7a0b11391c56b84634995444fc15e8

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