Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff9e6b61c666e72b…

MALICIOUS

PDF

69.8 KB Created: 2021-03-15 15:27:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 954ad5b32ec27c9614dc190eea03fc81 SHA-1: a4650cc2fd575b1cd1b546d97c58efbb874bb7e9 SHA-256: ff9e6b61c666e72b9e054b0befecdb12a56f7772f23b4d10d4ca7c61614a1819
186 Risk Score

Malware Insights

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

The PDF document contains numerous external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to malicious sites. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to distribute malware or phish for credentials.

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://dugedepap.ru/strik?utm_term=curtis+sno-pro+3000+snow+plow+parts PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4462974/normal_600e3ec58dfe5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374852/normal_5fe0b86d35d41.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459467/normal_5ff9d5c890d0e.pdfIn PDF document text
    • https://pesakezered.weebly.com/uploads/1/3/4/7/134729162/a5a8dd1b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403808/normal_6045f193a7cf3.pdfIn PDF document text
    • https://furimubabo.weebly.com/uploads/1/3/1/8/131856330/2119435.pdfIn PDF document text
    • https://jopakawinotu.weebly.com/uploads/1/3/1/4/131407654/nuzak.pdfIn PDF document text
    • http://jozarizotugi.22web.org/benny_hill_ringtone_android.pdfIn PDF document text
    • https://rubexanow.weebly.com/uploads/1/3/5/3/135346757/gegave-kalavusoxokisi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470679/normal_5fdaccdf1df09.pdfIn PDF document text
    • https://jipuziloki.weebly.com/uploads/1/3/2/6/132695969/804b5b87fe1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459636/normal_603e21e83408b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://ff102949-4c65-4b7b-925c-ea9a98d885fa.filesusr.com/ugd/7a16bb_5ab0e93fa9414a9f9150f940a35010cd.pdf?index=trueIn PDF document text
    • https://50fe66f1-00be-429c-ab6c-57a9f80d6ab9.filesusr.com/ugd/39cb9d_7596550b47ca4a0a9e9c31f08156eef4.pdf?index=trueIn PDF document text
    • http://rivudokuji.rf.gd/bebaginuxibarejag.pdfIn PDF document text
    • http://vubixegigag.rf.gd/fafex.pdfIn PDF document text
    • https://11484d69-1612-41b9-9199-165df1f08223.filesusr.com/ugd/e2f197_df45e4f0f5494b9ba1bc5cc62cdf8611.pdf?index=trueIn PDF document text
    • http://zovaner.rf.gd/82140528980.pdfIn PDF document text
    • https://e4586023-485a-43f1-9451-2d404684c5b7.filesusr.com/ugd/95ff22_9d46b648f7f7478690c2631427fba7ed.pdf?index=trueIn PDF document text
    • http://zunaxixe.rf.gd/whirlpool_dishwasher_wdf520padm3_troubleshooting.pdfIn PDF document text
    • https://3c86e5df-9a55-47dd-9d5b-c207b25ec6cd.filesusr.com/ugd/72bf36_2e34a50d82f141e2be69cb97ba068045.pdf?index=trueIn PDF document text
    • https://bb55feb6-a0c4-48ae-8f72-aea2c45912f8.filesusr.com/ugd/b9801a_c47d0ccd27b446398f39a3a4b91f2d84.pdf?index=trueIn PDF document text
    • https://506dbbd1-d4b3-44b1-a4c9-6b5d0cab6a23.filesusr.com/ugd/c75f60_0202d0dcef6b4c41b513099de63ef308.pdf?index=trueIn 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_off0000d29b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD29B 5148 bytes
SHA-256: 3885489dfb444fe2bfc9d368b1c73af4b61040575f6d67440bc5bb98c4612525
font_01_sfnt_off0000e43e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE43E 10996 bytes
SHA-256: c2839ccbc619160bc9748d240657f5e6aa4cca35b59730fd0d6db6f1caeb0405