Malicious PDF — malware analysis report

Static analysis result for SHA-256 e93aa78e5579a2db…

MALICIOUS

PDF

85.9 KB Created: 2021-09-01 09:34:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 7710c06f242886d42851e65bef87686f SHA-1: 67d39a040239b6dccd9ada325f12f82c146ccea3 SHA-256: e93aa78e5579a2dbb1f2c9af10e0fb8ef561c48e47ee3b5e002be2ab05d6d316
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The file contains numerous embedded URLs, many pointing to compromised WordPress sites or disposable hosting, suggesting it functions as a link farm to distribute malicious content or phish users. The presence of these links and the overall structure indicate an attempt to redirect users to potentially harmful external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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://pixomot.ru/uplcv?utm_term=quotes+for+little+angel PDF link annotation
    • http://minhledtran.com/luutru/files/jororupebovikirawibibupov.pdfIn PDF document text
    • http://muzycznescyzoryki.pl/userfiles/file/tozekudipupodixodam.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0c8425c5d7---waluje.pdfIn PDF document text
    • https://www.makathastaliklari.net/wp-content/plugins/formcraft/file-upload/server/content/files/16081eaedb0cb9---zefegukixigidelidadogofa.pdfIn PDF document text
    • https://cargotavio.ru/files/file/xekozewoxijafovupiwegudun.pdfIn PDF document text
    • http://hnspkjx.com/d/files/15158602870.pdfIn PDF document text
    • http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fafd03a0ca---48414590711.pdfIn PDF document text
    • https://spaslask.pl/wp-content/plugins/super-forms/uploads/php/files/vlbjkk6om2r7amgu5bug46rnhk/80947302383.pdfIn PDF document text
    • http://ha-sine.com/d/files/71516164686.pdfIn PDF document text
    • http://suvagcentr.ru/userfiles/files/73159311497.pdfIn PDF document text
    • https://barcelonamedicalcenter.com/files/galeria/files/25732714530.pdfIn PDF document text
    • https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/1611ebe644fb90---faladubifajupufa.pdfIn PDF document text
    • http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb2dd0ce30---96429782981.pdfIn PDF document text
    • http://aceonlinementors.com/userfiles/file/fapusuzazejejeb.pdfIn PDF document text
    • http://www.rify.us/cms-uploads/files/75763181565.pdfIn PDF document text
    • https://stgeorgedentalcare.in/ckfinder/userfiles/files/gekefepanurur.pdfIn PDF document text
    • http://fabtur.ru/upload/files/botivopujolub.pdfIn PDF document text
    • http://razaviota.ir/basefile/razaviotair/files/63855577943.pdfIn PDF document text
    • http://alnoorcity.com/userfiles/file/42809386814.pdfIn PDF document text
    • https://burgas-remonti.com/userfiles/file/padezilusifalorulegaruzob.pdfIn PDF document text
    • http://onlinecommerce.bg/uploads/pages/files/16342663077.pdfIn PDF document text
    • http://plenaadoracao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607a5c7d6130d---29285871377.pdfIn PDF document text
    • http://garant-fond.ru/ckeditor/ckfinder/userfiles/Images/files/97311603026.pdfIn PDF document text
    • https://noks.cz/wp-content/plugins/formcraft/file-upload/server/content/files/161007ad9c16d2---xosag.pdfIn PDF document text
    • http://vinaaquachem.com/uploads/files/10168539319.pdfIn PDF document text
    • https://rebel-guitars.com/wp-content/plugins/super-forms/uploads/php/files/12f9737658931a238a61e04e155aa493/fevuledawedebumuf.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_off0000eb35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB35 10548 bytes
SHA-256: a7e60af8557d8f1589f94eec29cc53f1896dc7ac69e03235516df8d5a881d5bd
font_01_sfnt_off0001037a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1037A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011b8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B8C 17676 bytes
SHA-256: 59a3f9ff5b707ecb2ffe49c3c0fb09457c522d76dca0120b7c69e3859a1146ed

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