Malicious PDF — malware analysis report

Static analysis result for SHA-256 561e5b56dd86f378…

MALICIOUS

PDF

83.4 KB Created: 2021-08-16 15:28:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: d7458eae5b1603c745a8c84c69b4058d SHA-1: 74bad42b0acfef9388fb8eb4568b3d2d09f41089 SHA-256: 561e5b56dd86f378c116b164f59c6685e21c5dbf1f3c22d3bc6dce6c00098e3d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs pointing to compromised WordPress uploads and other disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The presence of these links indicates an attempt to facilitate phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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://allytemp.ru/uplcv?utm_term=how+to+find+my+vehicle+engine+number PDF link annotation
    • http://witnesstherealist.com/wp-content/plugins/super-forms/uploads/php/files/7b5d527e6a2cfb3326d8b773bad82be2/wazagelimovodekiwopa.pdfIn PDF document text
    • http://kesifveotesi.com/files/jowipigogaxebirefir.pdfIn PDF document text
    • https://liftsystems.ro/LiftFiles/file/60417340908.pdfIn PDF document text
    • http://accomplishtheimpossible.com/userfiles_ati/file/manuzifizozizedabonalofos.pdfIn PDF document text
    • https://shotclock.ca/wp-content/plugins/super-forms/uploads/php/files/72dbbdc1bb69f1068dc61385f1917459/porezikijetufozakuvuv.pdfIn PDF document text
    • https://lotteppta.com/beta/assets/file/60814654813.pdfIn PDF document text
    • https://hps-gruppe.com/wp-content/plugins/super-forms/uploads/php/files/msemaq3dp5fbfpketevh48clog/loparibixipobulidalekir.pdfIn PDF document text
    • https://www.autodepotperformancegroup.ca/wp-content/plugins/super-forms/uploads/php/files/itdu45v1jd9uf7iaoi6pmgdtk0/78011969531.pdfIn PDF document text
    • http://sibmetiz.ru/upload_picture/67935847848.pdfIn PDF document text
    • http://grupogmec.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608eb28c213dc---38729226606.pdfIn PDF document text
    • http://cityclick.it/userfiles/files/rizomazinotavolibu.pdfIn PDF document text
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ee226e6abe1---kimavasifodudile.pdfIn PDF document text
    • http://ukkies.be/userfiles/file/turuguzejufinekamom.pdfIn PDF document text
    • https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609feddaecc7e---mefuvijexifironawive.pdfIn PDF document text
    • https://holzhaus-suedtirol.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b21d4d2651a---buruviwitex.pdfIn PDF document text
    • https://www.18fire.com/wp-content/plugins/super-forms/uploads/php/files/740f14d3456f8538ae56bf77f95cbc5c/56177111166.pdfIn PDF document text
    • https://marsanz.pl/uploads/fck/file/74958615052.pdfIn PDF document text
    • https://joepromenshealth.com/wp-content/plugins/super-forms/uploads/php/files/d86eed831a05d854b4d4fc11e259ad70/28877573105.pdfIn PDF document text
    • http://starringthestricklers.com/clients/2/2b/2b6f34f03d9ccbd43d04a050b3ab825e/File/55823226041.pdfIn PDF document text
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608d456ef0808---vivukuxixivowaneduzujise.pdfIn PDF document text
    • http://la-roofers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160e275eb9f99a---70107623622.pdfIn PDF document text
    • http://timavoshipsupply.it/userfiles/file/tawejomezuluw.pdfIn PDF document text
    • https://monacollection.ua/wp-content/plugins/super-forms/uploads/php/files/a0d954c0bf86e1a7cc6a1c4d0e4f093a/betusedafoxizotogivukura.pdfIn PDF document text
    • http://boothbayharborshipyard.com/userfiles/file/89941841250.pdfIn PDF document text
    • https://clifestyle.net/uploades/userfiles/file/korepeligegudesatu.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_off0000e2ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2EE 16360 bytes
SHA-256: ac78eb5dcd314a350f207e08f0d752d35456e95a35f3c0998834c006072323ec
font_01_sfnt_off00010d45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D45 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001255c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1255C 11088 bytes
SHA-256: 893cab863c87c8bad0192640f69f30a5a627cd5faf5dd7265e12c84dd071325a