Malicious PDF — malware analysis report

Static analysis result for SHA-256 30142c09166bc511…

MALICIOUS

PDF

84.8 KB Created: 2021-07-13 15:34:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 9ee485b490403f75f21cf340065b423a SHA-1: 87550a285ad0229957026b58b7b0c59ab73b4609 SHA-256: 30142c09166bc51156bbce6dea04c39ff628ea1a3dbfa3ecf14e992dc4c29ddf
156 Risk Score

Malware Insights

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

The PDF contains a large number of links, many of which point to compromised CMS upload directories or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://reszke.pl/fckeditor/editor/filemanager/connectors/php/file/pinowowizolozigasiwe.pdf In PDF document text
    • https://store-connector.com/_upload_bilder/_filemanager/file/zotiwaji.pdfIn PDF document text
    • https://zlato-eu.cz/upload/files/50155584539.pdfIn PDF document text
    • http://bharatdarshan.net/rgroup/ckfinder/userfiles/files/45743867132.pdfIn PDF document text
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c9bffea273---xufexejenolesemorog.pdfIn PDF document text
    • http://www.britocunhaadvocacia.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/1609280def2d7b---23409200294.pdfIn PDF document text
    • http://zabradli-znerezu.cz/userfiles/file/tubewaxokepekoduloriliku.pdfIn PDF document text
    • http://blesk-stroy.ru/userfiles/files/32786048584.pdfIn PDF document text
    • http://creative-format.com/upload/editor/files/71599053502.pdfIn PDF document text
    • http://wongkungfu.ca/clients/f/f5/f5c316b966f29b3192b3e9e3c5714b3c/File/vaker.pdfIn PDF document text
    • http://ahkjt.com/upfile/file/gisimilo.pdfIn PDF document text
    • http://schouteninterieurwerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16097ad027c7f9---9355597385.pdfIn PDF document text
    • http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d31979fff1---kilekipasobisawexib.pdfIn PDF document text
    • http://aquamedia.cn/ckfinder/userfiles/files/10745278034.pdfIn PDF document text
    • https://www.hospedeagora.com.br/wp-content/plugins/super-forms/uploads/php/files/jeroa1rausldf2g5kkekmjp0kj/xetukegesimuvo.pdfIn PDF document text
    • http://fundraisingwebsites.com/clients/9/96/963d931f30a9d2280975e71a7f923c96/File/74068385618.pdfIn PDF document text
    • https://www.aaptuk.org/ckfinder/userfiles/files/24180327332.pdfIn PDF document text
    • https://shian-jin.com/UserFiles/files/zilel.pdfIn PDF document text
    • https://www.alpha-dynamics.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16077784e46f71---zirizinaxumuxof.pdfIn PDF document text
    • http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160dbbba831e21---14104633525.pdfIn PDF document text
    • https://maydongy.com/wp-content/plugins/super-forms/uploads/php/files/sphiihkebll8c2uq47d396m8p0/43397708762.pdfIn PDF document text
    • http://eurogeographyjournal.eu/admin/fckfiles/file/ronorazegepixo.pdfIn PDF document text
    • https://qualitylightsolutions.com/wp-content/plugins/super-forms/uploads/php/files/3621e8eaac382cce7b599080e1d90def/zowem.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=dirty+words+starting+with+yPDF 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_off0000e98c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE98C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001019e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1019E 17200 bytes
SHA-256: c2bbeb57467394a5c434d5e57e55f27b671ac5eea668c31d1ae6cd84e5395895
font_02_sfnt_off00012e16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E16 10548 bytes
SHA-256: b446b93bcfae78af34102967fd26525d6383cbe023311bec67179a05af58cc98

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