Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0a83f62d34bfdbc…

MALICIOUS

PDF

87.3 KB Created: 2021-09-07 20:07:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 212b39075871bb60f721bec3c2c7eb3a SHA-1: 4b957b7555eadbe57fcc7fcd9534d03c815b85a4 SHA-256: d0a83f62d34bfdbc8ff3ff0a62abcaafba7a162ea0cc1d25fae7289e0969f58c
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, including a critical ClamAV detection for 'Pdf.Phishing.Trojan' and an ML classifier indicating maliciousness. The file contains a link farm pointing to numerous URLs, many hosted on compromised WordPress sites or disposable domains, suggesting an attempt to redirect users to malicious content. The presence of external URIs and the nature of the heuristics strongly indicate a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://chp-travel.ir/data/file/17702247779.pdf In PDF document text
    • https://mls.lighting/wp-content/plugins/super-forms/uploads/php/files/cdadc9090c4d21708bdb5b0327e4f63a/61388676186.pdfIn PDF document text
    • http://diamant-x.sk/UserFiles/file/zapanif.pdfIn PDF document text
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/160d9386c45449---83349042397.pdfIn PDF document text
    • https://mekongtransport.com/upload/userfiles/files/zilaxunemure.pdfIn PDF document text
    • http://bougerpourstarlight.com/clients/c/c6/c668404594a1c08d975ab50c7bec58f6/File/87635833184.pdfIn PDF document text
    • http://www.norestim.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160b99147923cd---32048231680.pdfIn PDF document text
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611027970944e---fagidazifufazumakewiwupa.pdfIn PDF document text
    • http://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/1607f147071609---99363453687.pdfIn PDF document text
    • http://english-island.pl/wp-content/plugins/super-forms/uploads/php/files/dsq6nl7pkj1p2140ii1tflaeo4/kovugipi.pdfIn PDF document text
    • https://medok18.ru/wp-content/plugins/super-forms/uploads/php/files/3da841cfdb55dfa53e5ec26ff99dbc97/netuzal.pdfIn PDF document text
    • https://sensiblemachines.com/ckfinder/core/connector/php/files/dizatedupogeka.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/aaoeinooo95gmqde3p6f9u5mq5/dofesone.pdfIn PDF document text
    • https://www.swx.global/wp-content/plugins/super-forms/uploads/php/files/bebbdf5c12533ea27f1d9a4a9aac0157/40584503914.pdfIn PDF document text
    • http://manchetenewsms.com.br/ckfinder/userfiles/files/kojidusefosujarusexibaja.pdfIn PDF document text
    • https://www.auditek.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1608e905bcdd71---femavodixaxibatif.pdfIn PDF document text
    • https://mollis.rs/files/70094265316.pdfIn PDF document text
    • https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160e62608cdb93---10435119777.pdfIn PDF document text
    • http://auto4-spb.ru/public/images/ckfinder/files/sewijadeketavotulemal.pdfIn PDF document text
    • https://lemarko.com/userfiles/file/17752171688.pdfIn PDF document text
    • https://eucolait.eu/userfiles/files/sozenafuvilivume.pdfIn PDF document text
    • https://www.lorenzofranzone.it/wp-content/plugins/super-forms/uploads/php/files/f07803bf75208fd36b2a118e855a36a3/suvixawefogaviw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=metabolismo+lip%C3%ADdeos+pdfPDF 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_off0000e986.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE986 10652 bytes
SHA-256: f59b2279489afab07cbc0a6e32ad9261ce005dbd6d07ec3d0dd68fd3738a2d7c
font_01_sfnt_off000101ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101AC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000119be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119BE 20044 bytes
SHA-256: e757aed3028cf5ef03b818ec8f02d870f65167f503b8639434007713f00fa383

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