Malicious PDF — malware analysis report

Static analysis result for SHA-256 27ef9a166d6b1342…

MALICIOUS

PDF

35.2 KB Created: 2020-06-04 16:25:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-07-24
MD5: 277b82241129a0d449bcd6db27ecc6a8 SHA-1: 7c83174876f7e5d0b399788b16b4ba2f6f9c14d9 SHA-256: 27ef9a166d6b1342d68caad34cd0ecb9c471806f661c6100f5b570b23afd152b
96 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell

The PDF file contains a significant number of external links, many of which point to similarly structured URLs on different domains. This pattern is indicative of a link farm, often used for SEO manipulation or to distribute malicious content. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious intent. No scripts were extracted, and the document body is heavily obfuscated, making it difficult to determine the exact payload or lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 4

  • 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.
  • 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 http://mspurbanloftoffice.com/uploads/1/3/1/3/131379247/131379247.html#amplificador+sony+xplod+800+watts+4 PDF link annotation
    • http://hostmaster.auroraweddingandevents.co.uk/uploads/1/3/0/7/130739158/1703059.pdfIn PDF document text
    • http://lifeisforlivingshow.com/uploads/1/3/0/5/130540296/xazozirimatuv.pdfIn PDF document text
    • http://alihsancomputer.com/uploads/1/3/1/6/131637095/05a01c383f38c0d.pdfIn PDF document text
    • http://ellikamusic.com/uploads/1/3/0/6/130639091/382772.pdfIn PDF document text
    • http://yourneighborcleaners.com/uploads/1/3/0/2/130287893/8f677f5b3e9e.pdfIn PDF document text
    • http://europeancruises.org/uploads/1/3/1/0/131070918/46eda68a9c.pdfIn PDF document text
    • http://m.lappeusfuneralhome.com/uploads/1/3/0/7/130775536/barezor.pdfIn PDF document text
    • http://mountaintimeconcierge.com/uploads/1/3/0/2/130287257/wezoguluruwakubavoka.pdfIn PDF document text
    • http://peoplenatureconnection.net/uploads/1/3/1/1/131163920/dojasipelufom.pdfIn PDF document text
    • http://mail.wesdoors.com/uploads/1/3/0/5/130551839/8248656.pdfIn PDF document text
    • http://autodiscover.bettinanorton.com/uploads/1/3/1/8/131860479/4959708.pdfIn PDF document text
    • http://host151.carmichaelnl.com/uploads/1/3/0/9/130969334/kanoxagivonetubi.pdfIn PDF document text
    • http://falsepeaknews.com/uploads/1/3/1/3/131379532/d623945dfc2895.pdfIn PDF document text
    • http://mspurbanloftoffice.com/uploads/1/3/1/3/131379247/terms.htmlIn PDF document text
    • http://mspurbanloftoffice.com/uploads/1/3/1/3/131379247/dmca.htmlIn PDF document text
    • http://mspurbanloftoffice.com/uploads/1/3/1/3/131379247/policy.htmlIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://temutexi.files.wordpress.com/2020/06/gilazogakifovux.pdfIn PDF document text
    • https://divasojawi.files.wordpress.com/2020/06/gugekarekajatagez.pdfIn PDF document text
    • https://vezuzetifuko.files.wordpress.com/2020/06/59803895019.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

Related samples 3

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005e8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E8B 10164 bytes
SHA-256: 80c1eb64823e232ca8eeca740f5b4d7466d8eddf1fd7dc3eb813b6894c5315b3

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