Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f4dd64814839a12…

MALICIOUS

PDF

85.9 KB Created: 2021-06-30 03:13:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 7604a806fb1733db4186895fb1a85f3f SHA-1: 2d3ecc2d38ff5e100bead585342fa0378ffe9167 SHA-256: 0f4dd64814839a127d898e4367e84ad304b61a24802c815ecd6c556fc6a5abeb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV and an ML classifier, with multiple heuristics indicating it functions as a link farm. The embedded URLs, such as 'https://inwebjor.ru/uplcv?utm_term=first+woman+deputy+secretary+general+of+united+nations', are likely used to redirect users to phishing sites or download further malicious content. The presence of numerous links and the compromised CMS upload detection suggest a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://inwebjor.ru/uplcv?utm_term=first+woman+deputy+secretary+general+of+united+nations PDF link annotation
    • http://seashoresilverlabradors.com/clients/4/48/482fd9669fb3260065120a60ccac5e48/File/50707916342.pdfIn PDF document text
    • http://vmkmsz.hu/userfiles/file/61825146796.pdfIn PDF document text
    • https://mariellatriolo.it/public/file/jojemubezakugokaxizezul.pdfIn PDF document text
    • https://admonks.ru/wp-content/plugins/super-forms/uploads/php/files/b3798a7d10f20e81a4d0b5e82cd72a06/favozud.pdfIn PDF document text
    • https://geneolock.com/locktactyuma/userfiles/file/pawuveteserova.pdfIn PDF document text
    • http://mppscstudy.com/admin/usercontent/file/gofemakimalibigekud.pdfIn PDF document text
    • http://www.everhouse.lt/wp-content/plugins/formcraft/file-upload/server/content/files/160ccb6a821e8e---bemitufijilivupenitazuj.pdfIn PDF document text
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/160760ff1019be---31329691670.pdfIn PDF document text
    • http://kalkulacka-hypo.cz/userfiles/files/45694995605.pdfIn PDF document text
    • http://dgjst.com/upfile/file/kudumozapeperowav.pdfIn PDF document text
    • https://eventspicer.com/ckfinder/userfiles/files/kusudolaw.pdfIn PDF document text
    • https://www.higher-energy-trampolineclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3b42a50b9a---vevuvimipun.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/895d5db8c65cd0479a34448b291e42ac/najexawusokodonexirovuked.pdfIn PDF document text
    • https://www.charityweiss.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608f2bc6407a1---xedunafenomedekiwesa.pdfIn PDF document text
    • http://mfcwestenkwartier.nl/beta/userfiles/file/kopakak.pdfIn PDF document text
    • https://christembassyromford.org/wp-content/plugins/super-forms/uploads/php/files/a4169516dd12861b87de71b74ffe06a7/5503462757.pdfIn PDF document text
    • https://gtsonline.nl/wp-content/plugins/super-forms/uploads/php/files/pliao5khplhijt0vrs330tsgv1/vadaritidojire.pdfIn PDF document text
    • http://www.socalgreatwhite.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090ff343f967---dinal.pdfIn PDF document text
    • https://stmarys-perthamboy.com/upload/File/wovozotokiwufef.pdfIn PDF document text
    • http://bagandpack.ru/wp-content/plugins/super-forms/uploads/php/files/0b572cd7cd38ffaf6b3daf8965646099/37918836368.pdfIn PDF document text
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/160838213d1c4a---donipukapuzolifakit.pdfIn PDF document text
    • https://ccveg.org/wp-content/plugins/super-forms/uploads/php/files/gbb5kek2a3r1eckcotk1dkv8go/46053391185.pdfIn PDF document text
    • http://beetsom.com/PROGRAM_FCKeditor_UserFiles/file/20666143560b0e2c65be6e.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_off0000ecdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECDB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000104f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104F2 11240 bytes
SHA-256: 190b853b91cb2a54bb129b1df92c8170523ca806c4c17dc0fd16478bd4f8eb1c
font_02_sfnt_off00011f24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F24 16468 bytes
SHA-256: 83a22d098ffd067f9e42372406b81b4d3fcbc28ee0d1ad362eea617af0b18194

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