Malicious PDF — malware analysis report

Static analysis result for SHA-256 eafbc55b7ac916cc…

MALICIOUS

PDF

80.8 KB Created: 2021-06-24 06:53:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: a27c2b441105f444ea73e94d025b08fa SHA-1: f073e2380523c6a6811fafa48014bc76798ab3d6 SHA-256: eafbc55b7ac916cc691e8ea2f64785af224a64e2feae8627a57c0f23c57ee3f8
96 Risk Score

Malware Insights

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

The PDF document is designed as a link farm, using a fake FFXIV guide lure to direct users to multiple external websites. Several heuristics indicate this is a link farm on compromised or disposable hosting, likely for SEO poisoning or phishing. No scripts were extracted, but the presence of numerous external URLs suggests the primary goal is to redirect users to potentially malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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://inwebjor.ru/uplcv?utm_term=ffxiv+astrologian+guide+shadowbringers PDF link annotation
    • https://www.letspassdriving.co.uk/wp-content/plugins/super-forms/uploads/php/files/2kk147vnmal039uloas2uof5j9/47301812637.pdfIn PDF document text
    • http://czytamzezrozumieniem.pl/userfiles/file/kofogesuvawatesadizoreduw.pdfIn PDF document text
    • http://mp-hd.de/data/aktualnosci_imgs/file/82644826681.pdfIn PDF document text
    • https://www.ediliziaindustriale.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3735215c39---lizijipusisi.pdfIn PDF document text
    • https://sinhadventure.com/uploads/file/5823882552.pdfIn PDF document text
    • https://engravestone.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac115d23950---1650995385.pdfIn PDF document text
    • http://munsusa.org/userfiles/file/20210525003331.pdfIn PDF document text
    • http://cedule-plachty.cz/files/file/12613073939.pdfIn PDF document text
    • http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a1c2ba0380a---91818637561.pdfIn PDF document text
    • https://bluebeakbranding.com/wp-content/plugins/super-forms/uploads/php/files/6e4d24363d70506435ea67397b2cdd34/nutefi.pdfIn PDF document text
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/gngn0i69fq08hsqtv4pqfn8sse/40632791542.pdfIn PDF document text
    • http://irina-beha.com/ckfinder/userfiles/files/venopujafuginizezexaxisug.pdfIn PDF document text
    • https://www.kadinlarsitesi.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608c6d8159ffa---64897417444.pdfIn PDF document text
    • https://www.kalirich.com/wp-content/plugins/super-forms/uploads/php/files/2fsq8crdkkjudm6v2ldf0pgf57/98337108347.pdfIn PDF document text
    • https://www.kbstephens.com/wp-content/plugins/super-forms/uploads/php/files/e29446f8e09d396579977f5c7561495a/89003650547.pdfIn PDF document text
    • http://c2r-auto.com/uploadfiles/file/2021053013510173499.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://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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fc6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC6A 5484 bytes
SHA-256: bda6be3cc8c48a124a6f40d37c0c4371aed3db38fd84b6a5ee00d929f0f0bbc4
font_01_sfnt_off00010f1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F1F 11392 bytes
SHA-256: 60278f7b139ffe5cda64e37eb0344a38743a0a5c9714e7d75d1bc4a6a2f4775a