Malicious PDF — malware analysis report

Static analysis result for SHA-256 bac04287b861e49d…

MALICIOUS

PDF

189.8 KB Created: 2021-06-21 02:53:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: fd8b07a7bb37dd072a01e676f2743e6e SHA-1: dad1a24b8eedc6612172675ecdd3dae86e7b54dd SHA-256: bac04287b861e49d15c0967ca2ff59c24fab5e128eb662cce0263186cfcc7171
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document contains numerous links pointing to compromised websites and disposable hosting, indicating a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. No scripts were extracted, but the embedded URLs and heuristic findings point to a pattern of redirecting users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://drafthe.ru/uplcv?utm_term=ninjago+season+9+episode+5 PDF link annotation
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/16082e1a2d5d2d---fejosatoxunapoladirif.pdfIn PDF document text
    • http://indianspringhomes.net/userfiles/files/pemesosikomuzenewuveda.pdfIn PDF document text
    • https://www.nordatec.com/wp-content/plugins/super-forms/uploads/php/files/9ee5epl99p1h610tli7eeooprg/namepediwemaweje.pdfIn PDF document text
    • https://rhagro.com.mx/wp-content/plugins/super-forms/uploads/php/files/3c5c9ca4d3c2c637cfb973ee01b32ca5/jobijimigunalovowusugivo.pdfIn PDF document text
    • https://tucsonhomewindowtint.com/wp-content/plugins/super-forms/uploads/php/files/76193d2439918e25e1ee4116234f11b1/negefogonudilos.pdfIn PDF document text
    • https://sitebyside.ru/wp-content/plugins/super-forms/uploads/php/files/b18a116487d66f938ac5760b313b09a4/73200804439.pdfIn PDF document text
    • https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/1609d4974325e2---jekajeturowogivota.pdfIn PDF document text
    • https://humicdp.com/uploads/2021-06-17/images/files/mujafuxoxevojipazajoxotat.pdfIn PDF document text
    • https://www.westcountrystoves.co.uk/wp-content/plugins/super-forms/uploads/php/files/1e11ceffabda168ab4ce164562af199a/10065253869.pdfIn PDF document text
    • http://wxeina.com/userfiles/files/38830782791.pdfIn PDF document text
    • https://areshin.ru/wp-content/plugins/super-forms/uploads/php/files/83b1195e4379e98b8badc8a7a895e38b/581789401.pdfIn PDF document text
    • http://musiconthebay.org/clients/2/26/269dd5bc96e197da989a8dccc71442af/File/43041720136.pdfIn PDF document text
    • http://claudiodauelsberg.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c4cef6ec080---98784977122.pdfIn PDF document text
    • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609492f1aeb42---zuvifofuxoda.pdfIn PDF document text
    • https://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/6ib4275p3903g355cuvkjh9uld/sigafuzewefubalovej.pdfIn PDF document text
    • http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087e787496ac---87827172171.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0002b258.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2B258 5324 bytes
SHA-256: d85a28134e63a3b2e4e1feb02f6a8392c39d55f34294907140f241b1e5017b22
font_01_sfnt_off0002c495.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C495 12548 bytes
SHA-256: 3a0e62d8aa04b02ccfe8db191926187ba7ad80a1983dc8969705c3862e9e77e5