Malicious PDF — malware analysis report

Static analysis result for SHA-256 277e36de13fe7d64…

MALICIOUS

PDF

90.6 KB Created: 2021-07-15 18:21:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: ed160edd4a4a8bfb724e1a7af38bf78c SHA-1: 5f9fd4525aef217f222135f6f791d87ad19c1b06 SHA-256: 277e36de13fe7d64d02b38e30c8bb910998f763931bcfb4e2aa589ce006a6d6f
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to numerous compromised WordPress sites and other domains, likely to host phishing content or facilitate malware downloads. The presence of multiple external URIs and link farm heuristics strongly suggests a phishing or credential harvesting campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9822

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://oniceh.ru/uplcv?utm_term=how+to+get+abs+in+2+weeks+for+13+year+olds PDF link annotation
    • https://www.nosolodespedidas.es/wp-content/plugins/formcraft/file-upload/server/content/files/16071a98927fd6---33672571820.pdfIn PDF document text
    • https://legacyltg.com/wp-content/plugins/super-forms/uploads/php/files/c112ba310677e3813f3cdb80c8be3e44/45922331986.pdfIn PDF document text
    • http://sjar-tech.com/uploadfile/file///2021070309280479.pdfIn PDF document text
    • https://wilsonbarrera.com/inicio/wp-content/plugins/formcraft/file-upload/server/content/files/160de9a319b546---sonigazufokixo.pdfIn PDF document text
    • https://plumcourse.com/wp-content/plugins/super-forms/uploads/php/files/12c007aa7aa6c140d96be2c5fcffade7/81453023381.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/16175552161684453b28e19ee4cad34c/vemuwifasidonorutix.pdfIn PDF document text
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/1606e6b227b0f8---63473654310.pdfIn PDF document text
    • https://jnfarley.com/wp-content/plugins/super-forms/uploads/php/files/g735g0mdocosp5f3sk8mi1ha87/37134019513.pdfIn PDF document text
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/b02eca2fd4db5300984d39dcf67e37da/16503506676.pdfIn PDF document text
    • https://enville.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084c077c1957---jewuzibizorur.pdfIn PDF document text
    • https://deniz-sogutma.org/img/userfiles/file/sozapifatadomoka.pdfIn PDF document text
    • http://aranykoronakft.hu/userfiles/file/jowofomubetogaxux.pdfIn PDF document text
    • http://studiopignotti.it/userfiles/files/kolokuxoxuzujiwatiwafuve.pdfIn PDF document text
    • https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16081fd9f4f0ee---52374264436.pdfIn PDF document text
    • http://galluccifaibano.com/userfiles/file/nabezomamogusenikiwovavum.pdfIn PDF document text
    • http://fitnessklub-impuls.pl/uploads/assets/file/keteg.pdfIn PDF document text
    • http://xn--m1age8bh.xn--p1ai/files/file/77189267888.pdfIn PDF document text
    • http://vudafrique.com/wp-content/plugins/super-forms/uploads/php/files/93292ec0cce050f82f6128ea87144952/52952781879.pdfIn PDF document text
    • https://flylights.pl/wp-content/plugins/super-forms/uploads/php/files/97lu3121f4m8jq3r55ogiqile3/vubemet.pdfIn PDF document text
    • http://staging.impactredevelopment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac3048a9c73---47966036459.pdfIn PDF document text
    • http://www.sempresaude.net/wp-content/plugins/formcraft/file-upload/server/content/files/16086177c53ce4---97297079876.pdfIn PDF document text
    • https://stewsites.com/wp-content/plugins/super-forms/uploads/php/files/d17fbc7ebe6f68307d3546878417f1e0/55601623065.pdfIn PDF document text
    • https://popa.com.br/wp-content/plugins/super-forms/uploads/php/files/0f0c9cb5e5ab37da9d79629004af4e54/dakozatixugized.pdfIn PDF document text
    • http://land89.com/ckupload/files/gozumoxiwebowipagopoxom.pdfIn PDF document text
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d1d01175ca8---50079660157.pdfIn PDF document text
    • http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/160ecf34e2dbf2---vejawumukadonelafosozi.pdfIn PDF document text
    • http://mfahk.com/upload/files/neguxefewezeweboririzifi.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_off0000fc26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC26 17000 bytes
SHA-256: 71e06b0b1110cd5c5b856937c46cb6216b070152731b80f801173aa53b99c2f4
font_01_sfnt_off0001284f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1284F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014066.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14066 11296 bytes
SHA-256: 8c975f58c1c3706f563c86e02ea9a0df9a3d4bd8846f958a2a9a927e0e648b80

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