Malicious PDF — malware analysis report

Static analysis result for SHA-256 2622eee8209259b9…

MALICIOUS

PDF

76.3 KB Created: 2021-06-03 00:02:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 18a08fe83ac34d358bb8300fa15888f4 SHA-1: 84ce0cba0cfe88521ce21a3d4cd0c2349d8a2573 SHA-256: 2622eee8209259b9b2c1140d03713fe770df0aef29176dc94d8f01e7a78d9d55
186 Risk Score

Malware Insights

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

This PDF document is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous external URLs that likely lead to phishing sites or other malicious content. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic strongly suggest this document is designed to redirect users to potentially harmful external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://infrive.ru/pbw?utm_term=amma+appa+kavithai+in+tamil+images+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4449603/normal_606307b04c7a5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408990/normal_60677ba0b62e8.pdfIn PDF document text
    • https://xaledojasuk.weebly.com/uploads/1/3/0/9/130969600/5992954.pdfIn PDF document text
    • https://zixavuxo.weebly.com/uploads/1/3/1/3/131398386/7447468.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410013/normal_6008e7093ed07.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4468551/normal_5fdfa72893a62.pdfIn PDF document text
    • https://lukajupuxeburi.weebly.com/uploads/1/3/4/6/134630189/wetinokimiwefo.pdfIn PDF document text
    • https://nitowapesapu.weebly.com/uploads/1/3/4/4/134442046/bevopipavini.pdfIn PDF document text
    • https://lusezatakobav.weebly.com/uploads/1/3/4/3/134352635/dc0c5f2.pdfIn PDF document text
    • https://filewefoxu.weebly.com/uploads/1/3/4/7/134750201/82586bc23bff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454180/normal_602078d101d9a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502336/normal_5fd693455bed9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408177/normal_602b3e6a1b223.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383295/normal_6041f455ceea3.pdfIn PDF document text
    • https://gawajofanobovap.weebly.com/uploads/1/3/5/2/135296378/domog_lugisap.pdfIn PDF document text
    • https://zazusixalug.weebly.com/uploads/1/3/4/4/134491239/54fb376.pdfIn PDF document text
    • https://molesomux.weebly.com/uploads/1/3/2/6/132681378/262309.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/f67c3ea2-c773-4e35-a13d-635ed9ceacab/pivareworatafisibiba.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b578f47d-4e67-41ef-8d1c-92aa5e0c3365/ponufomogego.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab7956ab-b844-4a41-8f4c-4e86c9a40bce/95096044676.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED30 5480 bytes
SHA-256: ad661774ade098d32b650d0207c6e03e95db663f223912b2b306415bf8e0691a
font_01_sfnt_off0000ffc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFC5 10472 bytes
SHA-256: 509550b03643d2866f46bc6db8c5973e97473bf1ace295976c0a81a281d54bf2