PDF malware analysis — malicious · 78db2b29721d7396

MALICIOUS

PDF

32.9 KB Created: 2020-05-18 06:57:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 718195111dc4a2fc62278f18cff3a32f SHA-1: 3cdd644d7692938fee6cdbc43637d7cd02bc7a23 SHA-256: 78db2b29721d739634a528eee1301b947e44b906b431735386332447ba899da2

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded URLs pointing to external PDF files, indicative of a link farm or SEO manipulation scheme. The ML classifier strongly flagged this PDF as malicious. While no scripts were extracted, the sheer volume of external links suggests a malicious intent to direct users to potentially harmful content or to manipulate search engine rankings.

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://ryan-olivia.com/uploads/1/3/1/4/131453081/131453081.html#borders+templates+for+word+documents
- http://thirdeye-solutions.com/uploads/1/3/0/5/130588490/jegurema_gatuw_venada_jizusa.pdf
- http://llimani.com/uploads/1/3/0/2/130288861/236972.pdf
- http://spiritcreekpublishing.com/uploads/1/3/0/6/130639077/tefinusun_rozamosumafigo_nudek.pdf
- http://vikingtours.dk/uploads/1/3/1/4/131411596/kokor.pdf
- http://tammybiggsgymnastics.org/uploads/1/3/0/4/130493248/gedasowulakepode.pdf
- http://samuelpluck.com/uploads/1/3/0/4/130488165/7780706.pdf
- http://lizharrod.com/uploads/1/3/0/4/130490117/6a54a95f99b.pdf
- http://partnershipbusinesssolutions.com/uploads/1/3/0/9/130969921/zuvud_sagodomexog_lufebojuf_dokufexawam.pdf
- http://goodgroundfx.com/uploads/1/3/0/5/130551656/8376497.pdf
- http://dandlfashions.com/uploads/1/3/0/3/130324112/2926419.pdf
- http://fernbabyfern.com/uploads/1/3/0/2/130287923/4fe2e9.pdf
- http://renownedinvestments.org/uploads/1/3/1/4/131483421/wugaboxodo.pdf
- http://realestateportfoliomanagers.com/uploads/1/3/0/7/130776864/2258789.pdf
- http://drcolemaneye.com/uploads/1/3/0/7/130738752/vojugesutuw-sigolasefu-bodekozevewovut-xobusajamiluvaz.pdf
- http://aivytheexplorer.com/uploads/1/3/0/2/130272443/ad1978bf08f.pdf
- http://augustadrywallexperts.com/uploads/1/3/0/7/130739754/wudejo.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- http://www.w3.org/1999/02/22-rdf-syntax-ns#
- http://purl.org/dc/elements/1.1/
- http://ns.adobe.com/pdf/1.3/
- http://ns.adobe.com/xap/1.0/
- http://ns.adobe.com/xap/1.0/mm/
- http://ns.adobe.com/xap/1.0/rights/
- http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off000056b6.bin` `3817f893d2bfc98af597bf7d6b0a7ec6cfbbda97bfefa7436b5b419d4a68a54a`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x56B6	9832 bytes

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