Malicious PDF — malware analysis report

Static analysis result for SHA-256 403d940f34bdc47a…

MALICIOUS

PDF

78.7 KB Created: 2021-09-02 14:51:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 7148e7ec49a52fb4be19eb9b4b42449c SHA-1: 64435dedb1c32ef209d3d1f696bd00b5b879c008 SHA-256: 403d940f34bdc47abc844dd07df4faed4cc4ea122663a854ed85d4f990a97677
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to disposable hosting or compromised CMS upload directories, indicating a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. No scripts were extracted, and the document body was unreadable, limiting the analysis of specific attack vectors beyond the link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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 http://spc1991.com/ckfinder/userfiles/files/neligozitazi.pdf In PDF document text
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c146e567db---wonojuvevoruduzebez.pdfIn PDF document text
    • https://pankalconstructora.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f9865a9245---radutuxuweb.pdfIn PDF document text
    • https://alteanetworks.fr/img/file/mejarokowomaworinep.pdfIn PDF document text
    • http://az4group.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608ef05dc8c9b---gegetujazolapigemod.pdfIn PDF document text
    • http://atomleasing.ru/media/File/xigawijolasaduvoluseb.pdfIn PDF document text
    • http://timnhanhonline.net/upload/files/20615167397.pdfIn PDF document text
    • http://huntland.hu/upload/file/dubavuzudifulilu.pdfIn PDF document text
    • https://egokituz.org/files/galeria/files/pafinorowugokisovupuxuwa.pdfIn PDF document text
    • https://camping-du-lac-dijon.com/fichiers/49590992022.pdfIn PDF document text
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a9cd93f594---bubonubi.pdfIn PDF document text
    • https://medicinasolidale.org/wp-content/plugins/super-forms/uploads/php/files/a59319d6bab599b7e41386d1cc7c8467/36597802582.pdfIn PDF document text
    • http://pokewaveanaheim.com/uploads/files/61149009518.pdfIn PDF document text
    • https://peterdegendt.be/file/2179412017.pdfIn PDF document text
    • https://rhythmcprandfirstaid.com/wp-content/plugins/super-forms/uploads/php/files/d9ad85354c0471aa0bce8af6e6d9a141/bilamidulimun.pdfIn PDF document text
    • http://www.kymenhome-etsinta.net/tiedostot/files/fadenerexiga.pdfIn PDF document text
    • http://dieta-plus.pl/userfiles/file/mefejimilesodofenuke.pdfIn PDF document text
    • http://hongphuc.vn/userfiles/file/wuzesugukur.pdfIn PDF document text
    • https://binarbaid.com/public_html/userfiles/file/wereto.pdfIn PDF document text
    • https://petribax.nl/userfiles/file/zebipixowabujinugoguvulir.pdfIn PDF document text
    • https://coffotea.com/uploads//files/202108080547406829.pdfIn PDF document text
    • http://staresecurity.com/userfiles/file/7057265912.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=land+titles+office+practice+manual+tasmaniaPDF 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_off0000cff1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFF1 17192 bytes
SHA-256: 394db075825938fb6972ce4ad49f96df6147e4fd58a9b2b274f612c44a8b7089
font_01_sfnt_off0000fc54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC54 10840 bytes
SHA-256: 5aa631386e17676f046f0b7983231f68ad07eb6fe8dca9408a60e54e64b2b228
font_02_sfnt_off00011554.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11554 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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