PDF malware analysis — malicious · 8186713cca17d14b

MALICIOUS

PDF

60.5 KB Created: 2020-05-25 03:31:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 00fdf11d2cb76c47f5caca9c86650e08 SHA-1: d592dcbbfe95803c467d08f3e19646ca23bd0655 SHA-256: 8186713cca17d14ba9a708304d4b2701642e0f82b4a2bd9b4a5ee9e7cf1938ec

104 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a mass external link farm, with many URLs pointing to PDF files hosted on various domains. One embedded URL, http://edugate.world/uploads/1/3/1/3/131398443/131398443.html#crack+expertgps+6.23, suggests a lure for cracked software. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of malicious intent.

Machine Learning

Nyx PDF Classifier malicious score 0.9999

Heuristics 5

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.
Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON

Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
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://edugate.world/uploads/1/3/1/3/131398443/131398443.html#crack+expertgps+6.23
- http://jaredfedgerton.com/uploads/1/3/0/3/130323390/af3b8bde2df8b.pdf
- http://austenhohendorf.com/uploads/1/3/1/1/131164171/3b45f4ad4816ed5.pdf
- http://smokinfranksbbq.com/uploads/1/3/1/4/131483488/307c508d4.pdf
- http://rent2ownshop.com/uploads/1/3/0/2/130287997/risebikel.pdf
- http://cooondemand.org/uploads/1/3/0/3/130313489/4845311.pdf
- http://3southernsisters.com/uploads/1/3/0/6/130604315/xuzezulexoka.pdf
- http://communitybackpackdesplaines.org/uploads/1/3/0/2/130270986/8448445.pdf
- http://pinkneyproperties.com/uploads/1/3/0/2/130272909/tibudox.pdf
- http://gsahawaii.org/uploads/1/3/0/6/130621004/tebafapodoxak.pdf
- http://upgradelearning.com/uploads/1/3/1/4/131408798/zufezorexudulevu.pdf
- http://allmymight.org/uploads/1/3/1/3/131382387/dudedal.pdf
- http://aimesif.com/uploads/1/3/0/6/130620551/7075987.pdf
- http://allaroundtowing209.com/uploads/1/3/0/5/130589126/lubarusetewako.pdf
- http://ciworldresearch.com/uploads/1/3/0/8/130874569/017ea942.pdf
- http://justbcosmetics.com/uploads/1/3/0/5/130589250/lopunu.pdf
- http://crowdrisediy.com/uploads/1/3/1/0/131071277/e72e9d.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_off0000c3e9.bin` `cf07c2e0bcdf293d1f6a52daab028f81e74b5062ba42799c9ab6c7455b0d3e82`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC3E9	10088 bytes

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