Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a2e4db8dbef976d…

MALICIOUS

PDF

33.0 KB Created: 2020-10-11 07:25:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: c640c9b8b55b8a6cc7e833e9bfa7ea52 SHA-1: 7caacf96e1d2bd920cc66a7e0d2009a6194a5c79 SHA-256: 7a2e4db8dbef976d3ff33dbfacb26ecdad3c2a309b146101bef22ee9b9ed0ce8
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one identified as a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'Midland county gis tx' and includes URLs that appear to be part of a link farm. The presence of numerous external links suggests an attempt to direct users to potentially harmful websites, possibly for SEO spam or phishing purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://ggtraff.ru/pify?keyword=midland+county+gis+tx In PDF document text
    • http://files.agremine.com/uploads/1/3/2/6/132681229/punogujarevabe_jizalukiwuviruj_pejokidag.pdfIn PDF document text
    • http://files.mymacedoniamonroe.com/uploads/1/3/0/7/130739200/585c6789e.pdfIn PDF document text
    • http://files.ahta.info/uploads/1/3/1/4/131437491/duxagabudutufuw.pdfIn PDF document text
    • http://files.businessevolution.co.nz/uploads/1/3/1/4/131483662/2941739d6807b5b.pdfIn PDF document text
    • http://boparigak.connectedhealingllc.com/uploads/1/3/1/0/131069839/30d7203.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/251dfacc-f236-4746-bc07-0e8d87feb5e1/tewigowebulesadebumu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/304f9282-d902-4628-8697-05f3392f9009/35157489004.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d478e5ea-66be-40a2-9238-880844671b5f/leweni.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9b8dca2-56d4-4d3e-bf49-a90d9e4addbd/5211802532.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6a8a6b0-ae3f-43e9-a8c5-db8a2555be2d/robiwaf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/24ad872e-eb7a-4c89-9b75-3a8e66b4ecbf/jikipemowi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68568317-4a84-4371-9567-678ad7f3cb2d/xogajusiwivafarazerul.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_off0000457d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x457D 5188 bytes
SHA-256: 4fe85048f649b34ecc2ff5903cd73d13035654f3c050f045482e97ce5c74734d
font_01_sfnt_off00005740.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5740 9504 bytes
SHA-256: 1cdfc16c59583698b86b66e349af0324a957bb7cd95b2ab77aed9be015db075a

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